plz answer !! I need your help​

Answer:

15 girls

Step-by-step explanation:

Answer:

15 girls

Explanation:

You first set up the ratio of boys to girls (4/5) as a fraction. Then you look. You make another fraction next to the 4/5 fraction to figure out how many girl are in the class.  You know that you are trying figure out how many GIRLS are in the classroom if their are 12 boys. So on the other fraction the DENOMONATER is going to have an x on it because you don't know how many girls their are and girls (according to the fraction boys to girls (4/5) are on the bottom. So, now you cross multiply. 12x5 is 60 and 60/4 is 15. Therefore, you get 15 as your answer.

Answer:

B,C, and E

Step-by-step explanation:

A histogram is a graphical illustration of information in bars of diverse heights. A histogram displays the shape and spread of continuous sample data. The true statements about the data essay scores for high school sophomores and juniors in a contest are; the juniors tended to have higher essay scores than the sophomores, the medians of both data sets are equal and the histogram is the best way to show that both distributions are nearly symmetric.

Answer:

bce

Step-by-step explanation:

14 bags of fertilizer are needed

Solution:

Given that You need to buy fertilizer for a circular flower bed with a diameter

of 13 feet

Diameter = 13 feet

[tex]radius = \frac{diameter}{2}[/tex]

[tex]radius = \frac{13}{2} = 6.5[/tex]

Therefore radius of circular flower bed is 6.5 feet

Area of circle is given as:

[tex]\text{ area of circle } = \pi r^2[/tex]

Substitute r = 6.5

[tex]\text{ area of circle } = 3.14 \times 6.5^2 = 132.665[/tex]

Given that one bag will fertilize 10 square feet

1 bag = 10 square feet

Then number of bags needed are:

[tex]\rightarrow \frac{132.665}{10} = 13.2665[/tex]

Thus approximately 14 bags of fertilizer are needed

Answer:

Monday: 70

Tuesday: 64

Wednesday: 50

Thursday: 55

Friday: 76

Step-by-step explanation:

Equations

Let's call x to the number of sandwiches ordered for Thursday's meeting. We know that for Wednesday’s, we'll need x-5 sandwiches, for Monday's, we'll need 20 more, i.e. (x-5+20)=x+15 sandwiches. For Tuesday's it will be 6 fewer than x+15, or x+9. Finally, for Friday's, it will be 12 more than x+9 or x+21. Summarizing:

Monday: x+15

Tuesday: x+9

Wednesday: x-5

Thursday: x

Friday: x+21

The fewest of them all is x-5 and is must be equal to 50

[tex]x-5=50[/tex]

[tex]x=55[/tex]

The number of sandwiches per day is

Monday: x+15=70

Tuesday: x+9=64

Wednesday: x-5=50

Thursday: x=55

Friday: x+21=76

The largest possible height of the plant is 1 inch, the smallest possible height is 0 inches, and the largest possible percent error in Jada's measurement is -25%.

To find the largest possible height of the plant, we need to round up the measurement of 3/4 inch to the nearest whole inch. In this case, that would be 1 inch. Therefore, the largest the actual height of the plant could be is 1 inch.

To find the smallest possible height of the plant, we need to round down the measurement of 3/4 inch to the nearest whole inch. In this case, that would be 0 inches. Therefore, the smallest the actual height of the plant could be is 0 inches.

The percent error in Jada's measurement can be found by calculating the difference between the approximate measurement and the actual measurement, dividing it by the actual measurement, and then multiplying by 100. In this case, the approximate measurement is 3/4 inch and the actual measurement could be between 0 and 1 inch. So, the largest possible percent error would be (3/4 - 1) / 1 * 100 = -25%, and the smallest possible percent error would be (3/4 - 0) / 1 * 100 = 75%.

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The missing figure is attached below.

Answer:

The first image from left.

Step-by-step explanation:

Given:

Rotation of the quadrilateral PQRS by 90 degree counterclockwise around the origin.

We know that, for a 90 degree counterclockwise rotation, the transformation rule for the coordinates is given as:

[tex](x,y)\to (-y,x)[/tex]

So, the 'x' and 'y' interchange their values after rotation and the 'y' value sign is reversed.

Now, let us check each option.

Option 1:

Coordinates of the original quadrilateral are:

P(5, 2.5), Q(1, 4), R(2, 2.5), and S(1, 1)

Now, after rotation by 90 degree counterclockwise, the coordinates of the transformed figure will be:

[tex](x,y)\to (-y,x)[/tex]. So,

P(5, 2.5) → P'(-2.5, 5)

Q(1, 4) → Q'(-4, 1)

R(2, 2.5) → R'(-2.5, 2)

S(1, 1) → S'(-1, 1)

Now, if we check the coordinates of P', Q', R' and S' on the first option, we see that they are same as calculated above. So, the correct option is option 1.

Option 2:

Coordinates of P are (5, 2.5) and coordinates of P' are (2.5, -5) which doesn't match with the transformation rule. So, this option is incorrect.

Option 3:

Coordinates of P are (5, 2.5) and coordinates of P' are (-5, 2.5) which doesn't match with the transformation rule. So, this option is incorrect.

The conversion factor used to convert kilometer per hour to meter per hour is [tex]1 \text{ meter } = \frac{1}{1000} kilometer[/tex]

Solution:

Given that average person's speed when riding a bike along a street is 18 kilometers per hour

To find: conversion factor used to convert the given speed to meters per hour

Given average speed = 18 km per hour

From the conversion parameters:

1 km = 1000 meters

or

[tex]1 \text{ meter } = \frac{1}{1000} kilometer[/tex]

So, we can use the above conversion factor to convert average speed into meters per hour

18 km per hour = 18000 meter per hour

So the conversion factor used to convert kilometer per hour to meter per hour is [tex]1 \text{ meter } = \frac{1}{1000} kilometer[/tex]

Thus option C is correct. 1000 meters for 1 kilometers

Answer:

its c

Step-by-step explanation:

Answer:

change to improper fractions first

6/8 + 6/24

make so there is a common denominator

6/8 × 3/3 = 18/24

now add

18/24 + 6/24 = 24/24 = 1

Answer:

3c-8

Step-by-step explanation:

Answer:

One notebook costs $2.50

Step-by-step explanation:

The cost of notebook is $2.50.

Algebra is the branch of mathematics that helps in the representation of problems or situations in the form of mathematical expressions.

Given:

let the number of pen be x

let the number of notebooks be y.

So, the equation can be written as

3x + 5y= 13.75....(1)

x - y = 1.25

3x- 3y = 3.75 ....(2)

Solving above 2 equation we get

8y = 10

y= 10/8

y= 5/4

y= 1.25

and, x= 1.25+1.25=2.50

Hence, the notebook costs $2.50.

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Answer:

x = 25

y = 60

Step-by-step explanation:

Angles with meauseres 80° and 4x° are the same-side interior angles when two parallel lines are cut by transversal. This means the sum of the measures of these angles is equal to 180°.

[tex]80^{\circ}+4x^{\circ}=180^{\circ}\\ \\4x=180-80\\ \\4x=100\\ \\x=25[/tex]

Angles with measures 4x° and (2y - 20)° are vertical angles, so they are congruent:

[tex]4x^{\circ }=(2y-20)^{\circ}\\ \\4\cdot 25=2y-20\\ \\2y-20=100\\ \\2y=100+20\\ \\2y=120\\ \\y=60[/tex]

Answer:

-5x - 6x ≤ 8 - 8x - x

-11x ≤ 8 - 9x

-2x ≤ 8

x ≥ -4

Answer: (x + 1 )(x+5)

Step-by-step explanation:

Given :

[tex]x^{2}[/tex] + 6x + 5

Compare with the general quadratic equation:

a[tex]x^{2}[/tex] + bx + c

To factorize , you are  to find two numbers that multiply to give ac , and add to give b.

After which you will re - write the middle number with those numbers.

From the given question , ac = 5[tex]x^{2}[/tex] , we are to find two numbers that will multiply to give 5[tex]x^{2}[/tex] and add to give 6x.

The numbers are 1x and 5x.

We will then replace the middle number by the two numbers , that is

[tex]x^{2}[/tex] + x + 5x + 5

x(x+1) +5( x +1)

(x+1)(x+5)

Answer:

Angle M = 98 degrees

Step-by-step explanation:

All triangle angles add up to 180.

Set up equation like this:

(x+6)+(3x-16)+(x)=180

Combine like terms.

5x-10=180

Add on both sides.

5x=190

Divide 5 both sides.

x=38

Solve for angle M.

3(38)-16=98

Answer:

x=4.8

Step-by-step explanation:

5x+3=27

   -3     -3

5x=24

/5  /5

x = 4.8

Answer:

Sam has 27 pencils. He has 3 loose pencils and 5 packs of pencils with x pencils in each pack.

Step-by-step explanation:

Hope it helps u............

Ok, so 27 is >, 30 is <, 13/5 is 2 3/5, 5 2/7 is 37/7, 9 3/4 is 39/4, and 23/3 is      7 2/3

I did not do #27 and #30, just did the table.

Answer:

72 cubes

Step-by-step explanation:

Attached is the picture drawn (though not great one), showing 6 cube on length of prism, 3 cubes on width and 4 cubes on height of prism.

Given: Length of prism= 6

           Width= 3

            Height= 4

To know the number of cubes, which can fill the entire prism, we need to find volume of prism.

∴ Volume of prism= [tex]length\times width\times height[/tex]

Volume of prism= [tex]6\times 3\times 4= 72[/tex]

∴ 72 units of cube can fill the entire prism.

Answer:

x-intercept = (-1,0)

y-intercept = (0,-3)

Explanation:

x-intercepts are points where the line crosses the x-axis.

y-intercepts are points where the line crosses the y-axis.

Answer:

D

Step-by-step explanation:

Answer:

y=-2x-3

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-5-(-3))/(1-0)

m=(-5+3)/1

m=-2/1

m=-2

y-y1=m(x-x1)

y-(-3)=-2(x-0)

y+3=-2(x)

y+3=-2x

y=-2x-3

Answer:

see explanation

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slopw and c the y- intercept )

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (3, 2) and (x₂, y₂ ) = (5, - 1)

m = [tex]\frac{-1-2}{5-3}[/tex] = - [tex]\frac{3}{2}[/tex], thus

y = - [tex]\frac{3}{2}[/tex] x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (3, 2), then

2 = - [tex]\frac{9}{2}[/tex] + c ⇒ c = 2 + [tex]\frac{9}{2}[/tex] = [tex]\frac{13}{2}[/tex]

y = - [tex]\frac{3}{2}[/tex] x + [tex]\frac{13}{2}[/tex] ← equation of line

Answer:

The equation of the line passing through the given points is

[tex]y=-\frac{3}{2}x+\frac{13}{2}[/tex]

Step-by-step explanation:

GIven two points are (3,2) and (5,-1)

To find the equation of the line passing through these two points

Let [tex](x_{1},y_{1})[/tex] and  [tex](x_{2},y_{2})[/tex] be the two points (3,2) and (5,-1) respectively

Using the two points formula for finding slope:

[tex]m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]

[tex]m=\frac{-1-2}{5-3}[/tex]

[tex]m=\frac{-3}{2}[/tex]

Therefore [tex]m=-\frac{3}{2}[/tex]

By using  formula:

[tex]y=mx+c[/tex]

Here Let (x,y) be (3,2)

[tex]y=mx+c[/tex]

[tex]2=-{\frac{3}{2}}\times 3+c[/tex]

[tex]2=\frac{-9}{2}+c[/tex]

[tex]c=\frac{9}{2}+2[/tex]

[tex]c=\frac{9+4}{2}[/tex]

[tex]c=\frac{13}{2}[/tex]

Therefore substitute values of m and c in

[tex]y=mx+c[/tex]

[tex]y=-\frac{3}{2}x+\frac{13}{2}[/tex]

Therefore the equation of the line passing through the given points is

[tex]y=-\frac{3}{2}x+\frac{13}{2}[/tex]

Answer:

$3.70

Step-by-step explanation:

divide 1.48 by 4 = .37

multiply by 10

Answer:

They are supplementary

Step-by-step explanation:

Two Angles are Supplementary when they add up to 180 degrees.

Answer:

slope of parallel line and perpendicular line are 5 and -1/5 espectively

equation of parallel and perpendicular line are y = 5x + 22 [tex]y= \frac{-1}{5} x+\frac{6}{5}[/tex] respectively

Step-by-step explanation:

y = 5x - 4 is in the form

y = mx + c

where m is the slope of the line and c is the y intercept of thr line

therefore slope of the line = 5 and y intercept = -4

when an another line is parallel to the given line then the slope of both the lines are equal

therefore the slope the parallel line = 5

equation of a line passing through a given point [tex](x_{1} ,y_{1})[/tex] with slope m is given by [tex]y-y_{1} = m(x-x_{1} )[/tex]

given [tex](x_{1} ,y_{1})[/tex]= (-4,2)

therefore equation of line y-2 = 5(x+4)

therefore y = 2+ 5x+20

y = 5x + 22is the eqaution of required line.

when two lines are perpendiculer then

[tex]m_{1} m_{2}=-1[/tex]

where [tex]m_{1} and m_{2}[/tex] are slope of the lines therefore

m×5=-1

therefore m= [tex]\frac{-1}{5}[/tex]

therefore eqaution of line passing through (-4,2) and with slope m= [tex]\frac{-1}{5}[/tex] is given by [tex]y - 2= \frac{-1}{5} (x+4)[/tex]

[tex]y= \frac{-1}{5} x+\frac{6}{5}[/tex]

We can see here that the line perpendicular to the given line, passing through (-4, 2), is (0, -6).

Let's first verify the given information and then find the point on the line perpendicular to the given line passing through (-4, 2).

Given line: y = 0.5x - 4

Slope of a line parallel to the given line:

The slope of the given line is 0.5. Parallel lines have the same slope. Therefore, the slope of a line parallel to the given line is also 0.5.

A point on the line parallel to the given line, passing through (-4, 2):

Since the slope of the parallel line is 0.5, and we know a point (-4, 2) that lies on it, we can find the equation of the parallel line using the point-slope form of a line.

Point-slope form: y - y1 = m(x - x1), where (x1, y1) is the given point, and m is the slope.

Substitute the values: y - 2 = 0.5(x + 4)

Now, let's find a point on the line perpendicular to the given line, passing through (-4, 2):

Slope of a line perpendicular to the given line:

Perpendicular lines have slopes that are negative reciprocals of each other. The slope of the given line is 0.5, so the slope of the line perpendicular to it is -1/0.5 = -2.

A point on the line perpendicular to the given line, passing through (-4, 2):

Using the point-slope form again, we can find the equation of the perpendicular line passing through (-4, 2).

Point-slope form: y - y1 = m(x - x1), where (x1, y1) is the given point, and m is the slope.

Substitute the values: y - 2 = -2(x + 4)

Now, we can find another point on the perpendicular line by setting x = 0:

y - 2 = -2(0 + 4)

y - 2 = -8

y = -6

So, another point on the line perpendicular to the given line, passing through (-4, 2), is (0, -6).

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Answer:

4x/9

Step-by-step explanation:

The quotient of four times a number and nine in an algebraic expression can be represented as (4x/9).

The quotient of four times a number and nine in an algebraic expression can be represented as (4x/9). Here, 'x' represents the unknown number. To calculate the value of this expression, you would multiply 4 with 'x' and then divide the result by 9. For example, if the unknown number is 6, the expression would evaluate to (4 * 6)/9 = 24/9 = 2.67.

In the realm of algebraic expressions, the quotient derived from four times an unspecified number divided by nine takes on the simple yet versatile form of (4x/9), with 'x' standing in as the variable denoting the unknown quantity. The computation entails a straightforward process wherein you multiply the value of 'x' by 4 and subsequently divide the outcome by 9. For instance, if 'x' were to represent the value 6, the expression's evaluation would unfold as follows: (4 * 6)/9 = 24/9 = 2.67. This straightforward algebraic framework empowers us to efficiently compute the result based on the specific value attributed to 'x,' facilitating various calculations and problem-solving endeavors.

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Answer:

x = 13.7

Step-by-step explanation:

This is a right triangle so we use the trig ratios. We need an angle of reference (not the right angle) and any side (which is given, hypotenuse = 47).

We can either find the angle at the top or the right to be the angle of reference, Θ (theta).

Angle at the top:

The two angles, 17° and the unknown interior angle add to 90° because they are complementary.

∠Θ = 90° - 17° = 73°

Now use the trig ratio cosine.

cosΘ = adjacent ÷ hypotenuse

cos(73°) = x / 47

x = 47cos(73°)

x = 13.74147.....    Round down the exact answer to nearest tenth

x ≈ 13.7                Answer

The value of x is the same as the side adjacent to the angle of reference I chose.

If I chose the other missing angle to be the angle of reference, I would use sine and x would be opposite.

Answer: 6xv( v - 3 )

Step-by-step explanation:

6xv² - 18xv

Looking into the equation critically, we could see that 6xv is common to the expression.

Therefore, the expression now becomes

6xv( v - 3 ).

Final answer:

Using a system of equations, it's found that Mo's farm stand sold 65 pounds of peaches, with the total sales of apples and peaches being 165 pounds and revenue $337.50.

Explanation:

To determine how many pounds of peaches Mo's farm stand sold, we can set up a system of equations based on the given information about total weight and revenue from apples and peaches. The weight equation can be written as A + P = 165, where A is the weight of apples sold and P is the weight of peaches sold. The revenue equation is 1.75A + 2.50P = 337.50.

Let's solve for A using the weight equation: A = 165 - P. Substitute A in the revenue equation: 1.75(165 - P) + 2.50P = 337.50. Upon solving, we get: 288.75 - 1.75P + 2.50P = 337.50, which simplifies to 0.75P = 48.75. Therefore, P, the weight of peaches sold, is 65 pounds.