Math help!
What is the value of a?

Since it's 48 out of 160 and you're trying to find the percentage out of 100, this particular formula would look like this: 48/160=x/100.

Then you cross multiply: 48x100=4800

Then you take the result of that and divide it by the total number of houses. 4800/160=30

30% of the houses are brick.

Answer:

[tex]f(x)=8x^2+73x-70[/tex]

Step-by-step explanation:

We are given

zeros as -10 and 7/8

now, we can set up function as

[tex]f(x)=a(x-(-10))(x-\frac{7}{8})[/tex]

now, we are given that

leading coefficient is 8

so, a=8

now, we can plug it

[tex]f(x)=8(x-(-10))(x-\frac{7}{8})[/tex]

now, we can simplify it

[tex]f(x)=8\left(x^2+\frac{73x}{8}-\frac{35}{4}\right)[/tex]

so, we get

[tex]f(x)=8x^2+73x-70[/tex]

Answer:

B and C

Step-by-step explanation:

There are two ways of looking at this question. You can do it algebraically or you can make a graph that will give you the answer visually.

Graph

I'll try to do both. First the graph. (See below)

The graph tells us that the line is shifted

Algebra.

g(x) = 2^[(x - 1) + 3] + 3 (+ 2)

The rewrite shows that +3 means left. +2 means up.

After drinking 24 gallons out of the required 40 gallons, the elephant needs at least 4 more tanks of water as each tank holds 4 gallons. The inequality representing this is x ≥ 4.

The student needs to calculate how many more tanks of water an elephant needs to drink to reach its daily requirement of at least 40 gallons if each tank contains 4 gallons of water. To start, we determine how much water the elephant still needs after drinking 24 gallons:

Required daily water - Water already consumed = Remaining water needed

40 gallons - 24 gallons = 16 gallons

Next, we find out how many tanks are needed for the remaining 16 gallons, knowing that each tank holds 4 gallons:

Number of tanks needed = Remaining water needed / Water per tank

Number of tanks needed = 16 gallons / 4 gallons per tank

Number of tanks needed = 4 tanks

Since the elephant needs at least 40 gallons, it will need at least 4 more tanks of water. However, since we're writing this as an inequality, we want to express that the elephant may drink more. Hence, the inequality will be:

x ≥ 4

Answer:

133*3+90*3+30*p

Step-by-step explanation:

add all that up then divide it by three

Answer:

p=43°

Step-by-step explanation:

We know that the sum of angles inside the triangle is 180 degree

One angle is P, we find other two angles

Angles in a straight line is 180 degree.

angle adjacent to 133 is 180-133=47

angle adjacent to 90 is 180-90=90

To find out P, we add all the angle and make it equal to 180 degree

p + 47+90= 180

p+137= 180

Subtract 137 on both sides

p=43°

The set of all possible vectors you can reach with the linear combination of two vectors is called the linear span of the set of two vectors.  

We often write the span of a set of vectors S as span(S) and it's itself a vector space, a subspace of the vector space from which the elements of S are drawn.

Answer:

I think you can also call it a vector space.

Step-by-step explanation:

Answer:

( 85 x 6 ) - 69 would equal 441

Step-by-step explanation:

You do 85 x 6 then - 69 (:

Answer:

441

Step-by-step explanation:

first do the

(85x6) you get 510

510-69

441

Answer:

√85

Step-by-step explanation:

The distance formula tells you the distance between (x1, y1) and (x2, y2) is ...

... d = √((x2-x1)^2 +(y2-y1)^2)

For your points (-1, -4) and (-8, 2), the distance is ...

... d = √((-8 -(-1))^2 +(2 -(-4))^2) = √((-7)^2 +6^2) = √(49 +36)

... d = √85

The distance between the two points is √85.

Answer:

[tex]t\leq 70[/tex]

Step-by-step explanation:

The team spends 20 minutes running laps

At least 15 minutes discussing plays.

Practice lasts one hour and 45 minutes.

We know that 1 hour = 60 minutes, so the practice lasts,

60+45= 105 minutes.

The team spends a total of [tex]20+15=35[/tex] minutes  in running and discussion.

So the time remaining to work on other drills is,

[tex]t\leq 105-35[/tex]

[tex]t\leq 70[/tex]

Answer:

Kyle can jump rope the most times per minute.  

Step by step explanation:

We have been given that Daren can jump rope 116 times in 2 minutes.

So number of rope jumps done by Daren in 1 minute will be:

[tex]\text{Unit rate of Jump rope done by Daren}=\frac{116\text{ times}}{2\text{ minute}}[/tex]

[tex]\text{Unit rate of Jump rope done by Daren}=58\frac{\text{ times}}{\text{ minute}}[/tex]

Therefore, Daren jumps rope 58 times per minute.

We have been given that Kyle can jump rope 240 times in 4 minutes.

So number of rope jumps done by Kyle in 1 minute will be:

[tex]\text{Unit rate of Jump rope done by Kyle}=\frac{240\text{ times}}{4\text{ minute}}[/tex]

[tex]\text{Unit rate of Jump rope done by Kyle}=60\frac{\text{ times}}{\text{ minute}}[/tex]

Therefore, Kyle jumps rope 60 times per minute.

We have been given that Marissa can jump rope 225 times in 5 minutes.

So number of rope jumps done by Marissa in 1 minute will be:

[tex]\text{Unit rate of Jump rope done by Marissa}=\frac{225\text{ times}}{5\text{ minute}}[/tex]

[tex]\text{Unit rate of Jump rope done by Marissa}=45\frac{\text{ times}}{\text{ minute}}[/tex]

Therefore, Marissa jumps rope 45 times per minute.

As Kyle jumps rope 60 times per minute, which is greater than jumps rope done by Daren and Marissa, therefore, Kyle can jump rope the most times per minute.

Answer:

27,600

Step-by-step explanation:

We use the following formula:-  

Number of permutations of r from n

= nPr

= n! / (n-r)!

I am assuming you don't allow repeated letters in the 4 letter codes.

Take S as the first letter. Then we have 3 letters extra out of 25 letters.

Using the above formula the possible ways of doing this is

25! / (25 - 3)!

25! / 22!

= 25*24*23

= 13800.

The same number is obtained if the first letter is a T.

So the answer is 2*13800

= 27,600

Answer: B

Step-by-step explanation:

Rocco: [tex]\dfrac{1}{7}[/tex] of the job per hour

Giulia: [tex]\dfrac{1}{x}[/tex] of the job per hour

Together: [tex]\dfrac{1}{3}[/tex] of the job per hour

Rocco + Giulia = Together

[tex]\dfrac{1}{7}[/tex] + [tex]\dfrac{1}{x}[/tex] = [tex]\dfrac{1}{3}[/tex]

[tex]\dfrac{1}{7}(21x)[/tex] + [tex]\dfrac{1}{x}(21x)[/tex] = [tex]\dfrac{1}{3}(21x)[/tex]

3x + 21 = 7x

       21 = 4x

       [tex]\dfrac{21}{4} = x[/tex]

It will take Giulia [tex]\dfrac{21}{4} = 5\dfrac{1}{4}[/tex] hours to paint the room by herself.

*******************************************************************************************

Giulia: [tex]r=\dfrac{1}{x}[/tex] = [tex]\dfrac{4}{21}[/tex]

A) [tex]\dfrac{3}{7} + 3(\dfrac{4}{21}) = 7[/tex]

    [tex]\dfrac{3}{7} + \dfrac{4}{7} = 7[/tex]

    [tex]\dfrac{7}{7} = 7[/tex]  

    1 = 7

    FALSE

B) [tex]\dfrac{3}{7} + 3(\dfrac{4}{21}) = 1[/tex]    

   [tex]\dfrac{3}{7} + \dfrac{4}{7} = 1[/tex]

    [tex]\dfrac{7}{7} = 1[/tex]  

    1 = 1

    TRUE

Answer:

b is the correct answer for edge

Step-by-step explanation:

Answer:

The number of other types of songs in Julie's MP3 player was 559.

Step-by-step explanation:

Total number of songs in Julie's MP3 player = 860

Rap

The percentage of rap songs in Julie's MP3 player = 20%

The Number of rap songs is 172  

R&B

Percentage of R&B songs in Julie's MP3 player = 15%

The Number of R&B songs in Julie's MP3 player = 129

Other Music

The number of other types of songs in Julie's MP3 player = 559

So the number of other types of songs in Julie's MP3 player was 559.

13x2. 13 is how much the cds cost. 2 is how many she is buying. 13x2 is 26. Check 13+13=26.26-13=13.

Hope this helps!

1 yard is 36 inches  

so 5 yards are 180 inches  

1 hour is 60 minutes  

so in 60 minutes she paints 180 inches  

or in 1 minute she paints 3 inches

Answer:

1 is the answer.

Step-by-step explanation:

(m + 3) / (m - -3)

m + 3 / m - - 3 = m + 3 / m + 3

m + 3 / m + 3 = 1

Please mark brainiest would help alot :3

Simplify:

"The sum of m and 3" => m + 3

"[the whole] divided by" => (m + 3)/

"The difference of m minus 3" => m - 3

(m + 3)/(m - 3) is your answer

~

Answer:

29.7

Step-by-step explanation:

The remaining distance is the total distance less the distance driven so far:

... 236.5 -69.4 -67.9 -69.5 = 29.7

The correct equation is 14 + n = 8n, option A is correct.

An equation is a combination of different variables, in which two mathematical expressions are equal to each other.

Let the number is n,

8 times of the number = 8n

According to the condition, The sum of 14 and number n is 8 times the number,

Implies that,

14 + n = 8n

The correct equation is 14 + n = 8n.

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Answer:

Can not be determined.

Step-by-step explanation:

We can easily notice that the limit is x tends to infinity, whereas x is not present in the given function, we are given (1 + 1/n). So we can not evaluate the given limit for x as parameter, we must have some function of x to solve this problem.

Hence, option C is correct i.e. the limit can not be determined.

Answer:

12x² -27x + 13

Step-by-step explanation:

First of all, expand the first two brackets and put the correlating values near each other:

10x² + 5x² -19x -8x -2 +13

10x² + 5x² = 15x²

-19x + - 8x = -27x

-2 + 13 = 11

15x² - 27x + 11

Now, subtract the values inside the third bracket:

15x² - 3x² = 12x²

11 - -2 = 11 + 2 = 13

So the end result is:

12x² -27x + 13

Answer:

The bowling alley should rent 150 pairs of shoes and should about 75 games per day in order to reach a goal of 300 dollars.

Step-by-step explanation:

1. PQ║TS, PQ ≅ TS, PT and QS are transversals to the parallel lines . . . given

2. ∠P ≅ ∠T . . . alternate interior angles at PT

3. ∠Q ≅ ∠S . . . alternate interior angles at QS

4. ΔPQR ≅ ΔTSR . . . ASA postulate

_____

You can use any pair of angles together with the sides PQ and TS. If you use the vertical angles and one of ∠T or ∠S, then you must invoke the AAS postulate for congruence, as the side is not between the two angles.

Answer:

10. It is a parallelogram.

11. The parallelogram is a rhombus.

Step-by-step explanation:

10. Use the given sets of congruent segments with congruent vertical angles XNY and WNZ to prove that triangles XNY and ZNW are congruent. Now use CPCTC to show that angles XYN and ZWN are congruent. They are alternate interior angles making sides XY and WZ parallel. Now use CPCTC to show that sides XY and WZ are congruent. Since a quadrilateral has two opposite sides that are both parallel and congruent, the quadrilateral is a parallelogram.

11. A rectangle and a square have 4 right angles. If you add 72 deg and 72 deg, you get 144 deg which is not a right angle. Since one angle of the parallelogram is not a right angle, the parallelogram is not a square or a rectangle.

There are two triangles. Let's look at the upper triangle. The triangle has 2 angles measuring 72 deg each. That means the opposite sides are congruent, and the triangle is isosceles. Since the quadrilateral is a parallelogram, opposite sides are congruent, so all 4 sides are congruent, and the parallelogram is a rhombus.

Answer:

10. It is a parallelogram.

11. The parallelogram is a rhombus.

Step-by-step explanation:

Let's simplify step-by-step.

3t−3+6t2+4t+13−8t2+11t−1

=3t+−3+6t2+4t+13+−8t2+11t+−1

Combine Like Terms:

=3t+−3+6t2+4t+13+−8t2+11t+−1

=(6t2+−8t2)+(3t+4t+11t)+(−3+13+−1)

=−2t2+18t+9

Answer:

1.A. 88.89

2.B.6.3%

3.C.64.92%

Step-by-step explanation:

1.[tex]\frac{8}{9}=0.8888[/tex]

to covert it into percentage multiply it with 100

then it becomes 88.888

rounding off to the nearest hundred it becomes 88.89

2. to convert into percentage multiply it with 100

therefore 0.063×100=6.3%

3. to find percentage

    %= (no of students using mobile / total no of students )× 100

       = [tex]\frac{792}{1200}[/tex]×100

       =64.918

Rounding off to nearest hundred it becomes 64.92%

Answer:

1) A. 88.89%

2) B. 6.3%

3) C. 64.92%

Step-by-step explanation:

1) After dividing 8 by 9, we get, [tex]\frac{8}{9} = 0.8889[/tex].

Now, percent of [tex]\frac{8}{9}[/tex] = 0.8889 * 100 = 88.89%

Hence, percent to nearest hundredth is 88.89%

2) We want 0.063 to be written in percent form

i.e. 0.063 * 100 = 6.3%

Hence, 0.063 into percent form is 6.3%

3) We are given that the total number of students are 1220 and the number of students that have cell phones are 792.

Therefore, the percent of students having cell phones = [tex]\frac{792}{1220} *100[/tex] = 64.92%

Hence, the percent of students having cell phones to nearest hundereth is 64.92%

The solution to the first equation 4x – 5 = 16 is x = 5.25. The solution to the second equation 35 + 3x – 11 = 23 is x = -0.33. Both solutions have been rounded to two decimal places.

Let's solve these two equations one by one:

a. 4x – 5 = 16

b. 35 + 3x – 11 = 23

These are the solutions to the equations, rounded to two decimal places.

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Answer: 2a - 7

Step-by-step explanation:

Ana: a

Mrs Vargas: 4a - 4

Leo: 2a + 3

 Mrs Vargas  -   Leo

=   (4a - 4)      -  (2a + 3)

=    4a - 4       -2a - 3

=    2a - 7

f(x) = 2x^2 - 4x - 3; opens up; vertex: (1, -5); y-intercept: (0, -3)

g(x) = -x^2 + x + 1; opens down; vertex: (0.5, 1.25); y-intercept: (0, 1)

h(x) = -2x^2 + 3x - 1; opens down; vertex: (0.75, 0.125); y-intercept: (0, -1)

m(x) = x^2 - 9; opens up; vertex: (0, -9); y-intercept: (0, -9)

n(x) = -3x^2 + 7; opens down; vertex: (0, 7); y-intercept: (0, 7)

I have attached an image of the functions and their graphs.

Hope this helps!

Answer:

[tex]f(x) = -x^2 +x +1[/tex]

Step-by-step explanation:

Quadratic equation is in the form of

[tex]f(x)= ax^2+bx+c[/tex]

When the value of 'a' is positive then the graph opens up

When the value of 'a' is negative  then the graph opens down

When the graph opens up then the vertex is minimum.

When the graph opens down then the vertex is maximum.

y intercept is the value of 'c'

[tex]f(x) = 2x^2 - 4x - 3[/tex], a=2 the graph opens up

[tex]f(x) = -x^2 +x +1[/tex], a=-1 the graph opens down. So the vertex is maximum. Y intercept is +1. y intercept is positive.

[tex]f(x) = -2x^2 +3x - 1[/tex], a=-2 the graph opens down. So the vertex is maximum. Y intercept is -1. y intercept is negative.

[tex]f(x) = 2x^2 - 4x - 3[/tex], a=2 the graph opens up