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Murljashka [212]
3 years ago
11

A student earned a grade of 80% on a math test that had 20 problems. how many problems on the test did the student answer

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
3 0
16 questions where answered correctly.
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What us the equation of the line that passes through point (2,5) and (0, -2)
erastovalidia [21]

Answer:

y = 7/2 x -2

Step-by-step explanation:

First we need to find the slope

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

   = (-2 -5)/(0-2)

   =-7/-2

   = 7/2

We know the y intercept is -2  ( The x coordinate is 0)

Using the slope intercept form of the equation

y = mx+b  where m is the slope and b is the y intercept

y = 7/2 x -2

5 0
3 years ago
The universally accepted film size for movies has a width of 35 millimeters. If you want to project a movie onto a square sheet
dlinn [17]

Answer:

<h2>The scale factor is 285.7143 ≅ 286.</h2>

Step-by-step explanation:

The square sheet has an area of 100 square meters.

Hence, the width of the sheet is \sqrt{100} = 10 meters.

The scale factor is needs to be in such a way, so that the film's wide will be match perfectly with the square sheet. Hence, 35x millimeters = 10 meters = 10000 millimeters .

x = \frac{10000}{35} = 285.7143.

6 0
3 years ago
A is directly proportional to b such that a = 2b. what is a if B =3? Also, what is b if a =7?
Papessa [141]
If b was 3 a will be 6 because 2*3=6
and for the second part b will be 3.5 because 2*3.5=7
5 0
3 years ago
Read 2 more answers
A package of modeling clay was shaped like a cone with a radius of 24 cm and a height of 6 cm. Miriam used all the clay to make
Darina [25.2K]
Given:
Cone shape: radius = 24 cm ; height = 6cm
Cylinder: radius = 16cm

We need to find the volume of each shape.

Volume of a cone = π r² h/3 = 3.14 * 24² * 6/3 = 3.14 * 576 * 2 = 3,617.28

Volume of a cylinder = π r² h
3,617.28 = 3.14 * 16² * h
3,617.28 = 3.14 * 256 * h
3,617.28 = 803.84 h
3,617.28 / 803.84 = 803.84h/803.84 
4.5 = h

The height of the cylinder is 4.5cm
7 0
3 years ago
What does -4(3x-4)=44<br> What is x
eduard

Answer:

-7/3

Step-by-step explanation:

6 0
2 years ago
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