An engineering student answered 81 questons correctly on a 90 question test. What percent of the question did she answer correctly?

Answer:

it's -1/2

Step-by-step explanation:

you need to go half way between 0 and -1 and that's -1/2

Answer:

-0.5 or -1/2

Step-by-step explanation:

You can solve using operations or with a number line.

To find the value halfway between two numbers, add the two numbers and divide the sum by 2.

Q = (0 + -1)/2

Q  = (0 - 1)/2

Q = -1/2

Q = -0.5

Number line:

<- (-1) --------- (-0.5) ---------- 0 ----------- (0.5) --------- (1) ->

Find halfway between 0 and 1.

Q = -0.5

Answer:

e) Shamika= 224 balloon, Crystal= 112 balloon, Aliya= 114 Balloon.

f)  We know,Crystal sold "b" balloon

           Aliya sold (b+2) balloon

          Shamika sold 2b balloon.

As per data given in question part c that each balloon cost $2 and Total cost of balloon is $900.

Now, solving to find how much each student sold balloon at school´s winter dance.

As we know total cost is $900 and each balloon cost is $2.

∴ Total cost= [tex]Total\ quantity \times cost\ of\ each\ unit[/tex]

Total quantity= [tex]{b+(2+b)+2b}[/tex]

∴ [tex]\$ 900= {b+(2+b)+2b}\times \$ 2[/tex]

Once we solve, we will get the value of b as 112 balloon, which is the number of balloon sold by Crystal.

Substituting the value of b in the equation of Aliya and Shamika, we will get the number of balloon sold by them.

Which is 114 and 224 respectively.

Step-by-step explanation:

Given: Crystal sold "b" balloon

           Aliya sold (b+2) balloon

          Shamika sold 2b balloon.

As per data given in question part c that each balloon cost $2 and Total cost of balloon is $900.

Now, solving to find how much each student sold balloon at school´s winter dance.

As we know total cost is $900 and each balloon cost is $2.

∴ Total cost= [tex]Total\ quantity \times cost\ of\ each\ unit[/tex]

Total quantity= [tex]{b+(2+b)+2b}[/tex]

∴ [tex]\$ 900= {b+(2+b)+2b}\times \$ 2[/tex]

Opening the parenthesis.

⇒[tex]\$ 900= (b+2+b+2b)\times \$ 2[/tex]

⇒[tex]\$ 900= 2+4b \times 2[/tex]

Dividing both side by 2

⇒ [tex]\$ 450= 2+4b[/tex]

Subtracting both side by 2

⇒ [tex]\$ 448= 4b[/tex]

Cross multiplying

∴[tex]b= \frac{448}{4} = 112[/tex]

∴ b= 112.

Hence, we can say Crystal have sold 112 balloons.

Next subtituting the  value of "b" in the equation for Aliya and Shamika to get number of balloon they have sold.

We know, Aliya sold b+2 balloons

∴ Aliya sold= [tex]112+2= 114\ balloon[/tex]

Aliya sold 114 balloon.

We know, Shamika sold 2b balloons

∴[tex]2\times 112= 224 balloon.[/tex]

Shamika sold 224 balloon.

Answer:

[tex]\frac{2}{5}[/tex]

Step-by-step explanation:

The total length of this line is 15 units. FG is 6 units long.

This means that the probability of p being on FG would be [tex]\frac{6}{15}[/tex] which can be simplified to [tex]\frac{2}{5}[/tex]

Answer:

2/5

Step-by-step explanation:

Line EH has three line segments:

EF which measure 4

FG which measures 6

GH which measures 5

The total measure of the line (EH) = 4 + 6 + 5 = 15

So if we are calculating the probability of landing on FG,

6 / 15

Reduce the fraction to make,

2 / 5

Answer:

24 hours in first week and 29 hours in second week.

Step-by-step explanation:

Given: Orlando work at $6/h in first week and at $7/h in second week.

           Total earning is $347 in both weeks.

Let the number of hours Orlando work in first week be`x` hours

∴ working hours in second week is (x+5) hours

Now, solving to find the number of working hours.

⇒ Total earning= earning in first week+earning in second week.

⇒ [tex]\$ 347= x\times 6+(x+5)\times 7[/tex]

Opening the parenthesis and solving it.

⇒ [tex]\$ 347= 6x+7x+35[/tex]

Subtracting both side by 35

⇒ [tex]312= 13x[/tex]

∴ x= [tex]\frac{312}{13} = 24\ h[/tex]

∴ Working hours in first week is 24 hours

   Working hours in second week is [tex]24+5= 29\ h[/tex]

Answer:

330 pages in 45 minutes

Step-by-step explanation:

All the work I did is at the top.So first we want to know how many minutes is 3/4 of an hour. We already know an hour is 60 minutes. Since it is out of 4 we are going to divide 60 by 4.

Hopefully you can read the work I put up there, but anyways it equals 15. Now we have to do 15 times 3 to get our answer

This equals 45. This means the person read 330 pages in 45 minutes!

Answer: z = 70

Explanation: To solve this proportion for z, we can use cross products.

*Image provided.*

When we get the equation 5z = 350, we can get z by itself on the left side of the equation by dividing both sides of the equation by 5. On the left, the 5's cancel each other out and we have z. On the right, 350 divided by 5 simplifies to 70 so we have z = 70.

Answer:

z = 75

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

28/2=14

16+14=30

30-6=24

-----------------

4*2=8

10-8=2

---------------

24/2=12

The actual distance from Los Angeles to San Diego is 130 miles.

Step-by-step explanation:

Given,

Distance from Los Angeles to San Diego on map = 6.35 cm

The given scale is;

1 cm = 20 miles

For measuring the actual distance we will multiply the distance on map with 20.

Actual distance = 6.5*20 = 130 miles

The actual distance from Los Angeles to San Diego is 130 miles.

Keywords: distance, multiplication

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Final answer:

To find the actual distance from Los Angeles to San Diego, multiply the map distance (6.35 cm) by the scale conversion factor (20 miles per cm), resulting in an actual distance of 127 miles.

Explanation:

The question deals with calculating the actual distance between Los Angeles and San Diego, given the scale on the map and the measured distance. To find the actual distance, you multiply the distance on the map by the conversion factor provided by the scale. In this case, the scale is 1 cm for every 20 miles. The measured distance on the map is 6.35 cm.

Therefore, the actual distance between Los Angeles and San Diego is calculated as follows:

Actual distance = Map distance × Scale conversion factor

Actual distance = 6.35 cm × 20 miles/cm

Actual distance = 127 miles

The actual distance from Los Angeles to San Diego is 127 miles.

The measure of the angle formed with the positive x-axis and the equation of the given line is 51° to the nearest degree

Step-by-step explanation:

The formula to find the angle between the positive part of x-axis and a line y = m x + b is tan(Ф) = m, where

∵ The equation of the line is [tex]y=\frac{5}{4}x[/tex]

∵ The form of the equation of a line is y = m x + b

∴ m = [tex]\frac{5}{4}[/tex] and b = 0

∵ Ф is the angle between the line and the positive part of x-axis

∵ tan(Ф) = m

∴ tan(Ф) = [tex]\frac{5}{4}[/tex]

- To find Ф use the inverse function of tan ( [tex]tan^{-1}[/tex]

∵ Ф = [tex]tan^{-1}(\frac{5}{4})[/tex]

∴ Ф = 51.34°

- Round it to the nearest degree

∴ Ф = 51°

The measure of the angle formed with the positive x-axis and the equation of the given line is 51° to the nearest degree

Learn more:

You can learn more about the linear equation in brainly.com/question/1284310

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Answer:

[tex]3a^4[/tex]

Step-by-step explanation:

What is the cube root of  [tex]27a^{12}[/tex]? This is the question.

We can write:

[tex]\sqrt[3]{27a^{12}}[/tex]

We will use the below property to simplify:

[tex]\sqrt[n]{a*b}=\sqrt[n]{a}  \sqrt[n]{b}[/tex]

So, we have:

[tex]\sqrt[3]{27a^{12}} =\sqrt[3]{27} \sqrt[3]{a^{12}}[/tex]

We will now use below property to further simplify:

[tex]\sqrt[n]{x} =x^{\frac{1}{n}}[/tex]

Thus, we have:

[tex]\sqrt[3]{27} \sqrt[3]{a^{12}} =3*(a^{12})^{\frac{1}{3}}[/tex]

We know power to the power rule:  [tex](a^z)^b=a^{zb}[/tex]

Now, we have:

[tex]3*(a^{12})^{\frac{1}{3}}\\=3*a^{\frac{12}{3}}\\=3a^4[/tex]

This is the correct answer:  [tex]3a^4[/tex]

He could have scored 7, 14, 21, 28, 35, or 42 points (all multiples of 7 less than 45).

answer: B

Answer:

8 ft²

Step-by-step explanation:

Since ΔEFG ~ ΔABC, they are proportionately related. Each of the corresponding sides differ by the scale factor, which shows how much bigger or smaller the new triangle is from the original triangle.

Purple = original triangle, triangle 1

Pink = new triangle, triangle 2

Find the scale factor, "k". It will be a fraction because the triangle gets smaller.

k = FG/BC = 2/3

The scale factor can be used to find a side, the height or the area of the new triangle.

Use the scale factor squared to find the area.

A₂ = (A₁)(k²)

= (18 ft²)(2/3)²

= 7.999...ft²

= 8 ft²

Answer:

The volume of the shipping box is [tex]V=27\ in^3[/tex]

Step-by-step explanation:

see the attached figure to better understand the problem

The volume of the triangular prism is equal to

[tex]V=BH[/tex]

where

B is the area of the triangular base

H is the height of the prism

In this problem we have

[tex]H=9\ in[/tex]

Find the area of the triangular base B

[tex]B=\frac{1}{2}bh[/tex]

we have

[tex]b=3\ in\\h=2\ in[/tex]

substitute

[tex]B=\frac{1}{2}(3)(2)=3\ in^2[/tex]

Find the volume of the triangular prism

[tex]V=BH[/tex]

we have

[tex]B=3\ in^2[/tex]

[tex]H=9\ in[/tex]

substitute

[tex]V=(3)(9)=27\ in^3[/tex]

Answer:

The graph is attached below.

Step-by-step explanation:

Given:

Zahra runs a 800-meter race at a constant speed.

Race starts from the finish line.

Finish line is at a distance of 800 m from the starting point.

Time is plotted on the x axis and Distance is plotted on the y axis.

So, the graph must start from the [tex]800^{th}[/tex] mark on the y axis when time is 0.

Now, the speed is constant which means that the slope of the line of distance versus time is a straight line because,

Speed [tex]=\frac{Distance}{TIme}[/tex].

Now, the graph should have the following properties:

1. Starting point of the graph should be (0, 800).

2. Final point of the graph should be (t, 0).

3. Slope should be constant everywhere. So, the graph must be a straight line.

Thus, the graph is a line joining the points (0, 800) and (t, 0) as shown below.

Answer:

bottom left

Step-by-step explanation:

Answer:

Number of games won = 110

Step-by-step explanation:

Given:

Total games played = 154

The ratio of number of games won to number of games lost = [tex]\frac{5}{2}[/tex]

Solution:

Let the number of games won be = [tex]5x[/tex]

Thus, number of games lost = [tex]2x[/tex]

The total games played can be given as = [tex]5x+2x=7x[/tex]

Thus, we have:

[tex]7x=154[/tex]

Dividing both sides by 7.

[tex]\frac{7x}{7}=\frac{154}{7}[/tex]

∴ [tex]x=22[/tex]

So, number of games won  = [tex]5\times 22 = 110[/tex]

Answer:

yes

what grade

Step-by-step explanation:

Answer:

y = 5x + 4

Step-by-step explanation:

y - 4 = 5(x - 0)

That is point-slope form. I'm not sure if you want it in slope intercept form, but slope intercept form of the equation is -

y = 5x + 4

Answer:

Step-by-step explanation:

thx i needed this

Answer:

x=11

Step-by-step explanation:

7(x)-7(3)=56

7x-21=56

7x-21+21=56+21

7x=77

7x/7=77/7

x=11

Answer:

Step-by-step explanation:

As per the given question, [tex]u(x) = -2x^{2}[/tex] and [tex]v(x) = \frac{1}{x}[/tex].

Hence,  (u circle v) (x) = u{v(x)} = [tex]\frac{-2}{x^{2} }[/tex]

The range of the function, (u circle v) (x) means the set of the values of x so that we will be able to get a proper finite, countable and exact value of the function.

For the above function, (u circle v) (x) we can not get a proper value of the function for x = 0.

Hence, the options A, C, D can not be the range of the function, since it contains 0.

The range of the given function will be the option B, since it does not contain the value 0.

Answer: C (pictured below)

This is the answer I selected on e2020 and got it correct.

Answer:

[tex]sin \theta =\frac{-8}{10} =-\frac{4}{5}[/tex]

Step-by-step explanation:

For this case we have a point given (-6,-8) and we know that this point is terminal side of 0​

We can assume that the length of th opposite side is given by:

b=-8 and the length for the adjacent side would be a=-6

And we can find the hypothenuse on this way:

[tex] c= \sqrt{a^2 +b^2}=\sqrt{(-6)^2 +(-8)^2}=10[/tex]

From the definition of sin we know this:

[tex]sin O =\frac{opposite}{hypothenuse}[/tex]

And if we replace we got this:

[tex]sin \theta =\frac{-8}{10} =-\frac{4}{5}[/tex]

We can aslo find the cos with the following identity:

[tex]cos^2 \theta + sin^2 \theta = 1[/tex]

And then:

[tex]cos \theta = \pm \sqrt{1-sin^2 \theta}=\pm \sqrt{1- (-4/5)^2}=\pm \frac{3}{5}[/tex]

But since both corrdinates are negative we are on the 3 quadrant and then [tex]cos \theta= -\frac{3}{5}[/tex]

(a) m=6h+15 can be used to find the total amount of money for h hours of babysitting.

(b) After 6 hours of babysitting, Scott will have $51.00

Step-by-step explanation:

Given,

Amount Scott has = $15.00

Per hour amount of babysitting = $6.00

a) Write an equation for the amount of money (m) Scott has after a number of hours babysitting (h).

Total amount of money = m

Number of hours babysitting = h

Total amount of money = Per hour earning from babysitting*Number of hours + Amount Scott has

[tex]m=6h+15[/tex]

m=6h+15 can be used to find the total amount of money for h hours of babysitting.

b) After how many hours of babysitting will Scott have $51.00?

Putting m = 51

[tex]51=6h+15\\51-15=6h\\36=6h\\6h=36[/tex]

Dividing both sides by 6

[tex]\frac{6h}{6}=\frac{36}{6}\\h=6[/tex]

After 6 hours of babysitting, Scott will have $51.00

Keywords: linear equation, division

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Answer:

Volume of the rectangular prism is [tex]11\frac{1}{4}[/tex] cubic feet.

The number of small cubes required is 90.

Step-by-step explanation:

The rectangular prism has a length of [tex]2\frac{1}{2}[/tex] feet, a width of 3 feet, and a height of  [tex]1\frac{1}{2}[/tex] feet.

Now, the volume of the rectangular prism will be [tex](2\frac{1}{2} \times 3 \times 1\frac{1}{2}) = (\frac{5}{2} \times 3 \times \frac{3}{2}) = \frac{45}{4}[/tex] cubic feet i.e. [tex]11\frac{1}{4}[/tex] cubic feet. (Answer)

Now, the volume of the small unit cubes of side lengths of [tex]\frac{1}{2}[/tex] feet will be [tex](\frac{1}{2})^{3} = \frac{1}{8}[/tex] cubic feet.

So, the number of small cubes required to fill the large cube will be [tex](\frac{45}{4} \div \frac{1}{8}) = 90[/tex]. (Answer)

Complete Question:

4 friends evenly divided up a n-slice pizza. One of the friends,Harris, ate 1 fewer slice than he received. How many slices of pizza did Harrison eat?

Answer:

Harrison ate [tex]\frac{n}{4}-1[/tex] slices of pizza.

Step-by-step explanation:

Given data, 4 friends evenly divided up a ‘n’ slice pizza.

Thereby, the number of slices that each friend get =  [tex]\frac{n}{4}[/tex]

Now, given Harrison ate 1 fewer slice than he received. As he received  [tex]\frac{n}{4}[/tex] slices, so 1 fewer than [tex]\frac{n}{4}[/tex] means [tex]\frac{n}{4}-1[/tex]

Thus, Harrison ate [tex]\frac{n}{4}-1[/tex] slices of pizza.

Answer:

n/4 - 1

Step-by-step explanation:

Hope this helps!

Answer:

option 3 ⇒ f⁻¹(x) =  [tex]\frac{x^{2} -2 }{3} [/tex]

Step-by-step explanation:

Given F(x) = [tex]\sqrt{3x+2}[/tex]

let y = f(x)

y = [tex]\sqrt{3x+2}[/tex]   ⇒ squaring the both sides

y² = 3x + 2  ⇒ subtract 2 from both sides

y² - 2 = 3x ⇒ divide both sides by 3

[tex]\frac{y^{2} -2 }{3} = x[/tex]

replace the location of x and y

∴ y = [tex]\frac{x^{2} -2 }{3} [/tex]

So, y will be f⁻¹(x)

∴ f⁻¹(x) =  [tex]\frac{x^{2} -2 }{3} [/tex]

Answer:

x = 31°

Step-by-step explanation:

Since, CB ║ FG and AB is a transverse, so ∠ BAG = ∠ ABC = 28° {Alternate angles}

Now, ∠ CAG = 90° = ∠ CAD + ∠ BAG

⇒ ∠ CAD = 90° - 28° = 62°

From, Δ ADE, ∠ ADE + ∠ DEA + ∠ EAD = 180°

⇒ ∠ ADE = 180° - 62° - 3x = 118° - 3x.

Now, ADB being a straight line, so ∠ ADE + ∠ EDC + ∠ CDB = 180°

⇒ 118 - 3x + x + 4x = 180

⇒ 2x = 62

⇒ x = 31° (Answer)

Answer:

No solution

Step-by-step explanation:

There is no way we can find the value of y, if x eliminates itself. Therefore, there is no solution.

Answer:

T=50+86.49N

Step-by-step explanation:

you just have to combine A and B.

Total (T)=A(50+30.65N)+B(55.85N) thank just open the prentices and add 30.65N and 55.85N=86.49N. so total is initial savings+ weekly savings by both.

Answer: the bakery will need about 70 trays

Step-by-step explanation:

718 can be rounded to 700

9 can be rounded to 10

700/10 = 70

Answer:

80 trays

Step-by-step explanation:

   718

÷     9

_________

    79.78 ≈ 80 trays

Answer:

Italy Time is in the Central European Time Zone . Central European Standard Time ( CET ) is 1 hours ahead of Greenwich Mean Time ( GMT+1 ).

Step-by-step explanation:

Central European Time Zone

Italy's time zone is one hour ahead of GMT (Greenwich Mean Time), so if it is 1 PM GMT, it would be 2 PM in Italy. This reflects the Time Zone Difference concept.

If Italy's time zone is GMT + 1, and it is currently 1 PM GMT, then the time in Italy would be 2 PM. This is due to the fact that Italy is one hour ahead of GMT (Greenwich Mean Time). Therefore, to convert from GMT to Italy's time zone, one simply needs to add one hour. For example, if it was 5 PM in GMT, it would be 6 PM in Italy, and so on. This concept is referred to as Time Zone Difference.

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