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3 years ago

There were 30 pupils in the computer room. 80% of the pupils were girls. How many girls were there in the computer room?

Mathematics

1 answer:

Lunna [17]3 years ago

6 0

80 percent of 30 is 24

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dry cleaning bill is shown by y equals 1.50 x + 4.50 y is the total cost and x is the number of shirts graph this equation

Blizzard [7]

Answer:

The graph in the attached figure

Step-by-step explanation:

Let

y------> the total cost

x------> the number of shirts

we know that

The linear equation is

$y=1.50x+4.50$ ------> equation of the line

To graph the line find the intercepts

The y-intercept is the value of y when the value of x is equal to zero

The x-intercept is the value of x when the value of y is equal to zero

<em>Find the y-intercept</em>

For x=0

$y=1.50(0)+4.50=4.50$

The y-intercept is the point (0,4.50)

<em>Find the x-intercept</em>

For y=0

$0=1.50x+4.50$

$1.50x=-4.50$

$x=-4.50/1.50=-3$

The x-intercept is the point (-3,0)

Plot the intercepts to graph the line

see the attached figure

8 0

3 years ago

A circle has a diameter of 40 in. Find the circumference of the circle to the nearest tenth. Use 3.14 for pi .

insens350 [35]

Answer: something is wrong circumference is solved by pi times the diameter or pi times the radius times 2

40 x 3.14 = 125.6

Step-by-step explanation:

Sorry man

6 0

3 years ago

What is the slope of the line in the graph?

alexandr1967 [171]

Answer:

$slope = \frac{(y - y)}{x -x} \\ = \frac{1 - 0}{0 + 1} =1 \\ you \: take \: two \: points \: a(0)(1) \\ b( - 1)(0) \\ then \: the \: slope \: is \: 1$

6 0

3 years ago

G(x)=f(x)+k,solve for k

vesna_86 [32]

Step-by-step explanation: