3 years ago

Solve the following system using elimination: 5x-2y= -19, 2x + 3y = 0

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

4 0

For this one I usually put the functions over one another like if it was an addition problem

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Callie surveyed 40 students at her school to see how many have dogs and/or cats. She found that 40% of students who have dogs, d

irina [24]

I think you need to show the tablle

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3 years ago

For what value of p the equation [p-3]x²+4[p-3]+4=0

Vikentia [17]

Step-by-step explanation:

(p-3)[x²+4]+4=0

(p-3)[x²+4]=-4

(p-3)=-4/x²+4

p=-4/x²+4+3

p=-4+3(x²+4)/x²+4

p= -4+3x²+12/x²+4

p=8+3x²/x²+4

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3 years ago

125% of what number is 25

Mazyrski [523]

We can create a equation to find out.

since we are finding a number where when multiplied by 1.25(this is the decimal form of the percentage) gives us 25, we know that the number we are finding is less than 25. here is the equation.

1.25(x)=25

divide both sides by 1.25 to get "x" alone.

x= 20

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3 years ago

Read 2 more answers

The circular opening of a tunnel has a circumference of 36 meters. What is the diameter of the tunnel?

Elza [17]

C=2(3.14159...)R
You’re given the circumference, so all you need to do is plug that in and simplify.
36=2(3.14159...)R
36=6.28R
36/6.28=R
R is about 5.73

7 0

3 years ago

cylinder with height 9 inches and radius is filled with water, it can fill a certain pitcher. How many of these pitchers can a c

larisa [96]

Answer:

Step-by-step explanation:

The 1st cylinder used to fill the pitcher has:

height:

h = 9 in

radius:

r = r

The volume of a cylinder is given by:

$V=\pi r^2 h$

Therefore, the volume of the 1st cylinder is

$V=\pi r^2 9=9\pi r^2$

We are told that the water inside this cylinder can fill a certain pitcher, so this is also the volume of the pitcher.

Then, we have a second cylinder, which has height

h = 9 in

and radius

r' = 2r

So the volume of this cylinder is

$V'=\pi r'^2 h = \pi (2r)^2 9 =9\pi (4r^2)=36\pi r^2$

This means that the number of pitchers that can be filled by this 2nd cylinder is

$n=\frac{V'}{V}=\frac{36\pi r^2}{9\pi r^2}=4$

8 0

4 years ago