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pishuonlain [190]
4 years ago
7

9) Gabriel took three math tests last semester. He scored a 91 on the first test, a

Mathematics
1 answer:
Firlakuza [10]4 years ago
3 0

The average of anything can be calculated by adding up all the terms and dividing by the number of terms.

In this case,

the number of terms = 3

x = the missing test score.

(91 + 72 + x) / 3 = 80

Let's multiply both sides by 3

91 + 72 + x = 240

Combine like terms.

163 + x = 240

Subtract 163 from both sides

x = 77

Carlos scored a 77 on his third test.

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How do i find the surface area?
daser333 [38]
Surface area is what it seems to be. All of the area of the solid's faces together. Like a cube, just find the areas of all of the squares that make the cube then add them together.
4 0
4 years ago
A hair salon uses 4 bottles of shampoo for every 3 bottles of conditioner.
Rama09 [41]

Answer:

I honestly think it is C.

Step-by-step explanation:

Since "4 bottles of shampoo for every 3 bottles of conditioner" is (4,3), I think the 16 is (16,12) on the graph. It might be worng, might be right. Just go for C.

7 0
4 years ago
John has a 6cm long rose candle. He lights the candle at 7pm. After two hours it was 3cm long. Find the slope of the line.
kifflom [539]

slope = change in height/change in time

(0,6) (2,3)

   = (6-3)/ ((0-2)

   = 3/-2

   =-3/2

The slope is -3/2

5 0
4 years ago
My textbook doesn't explain square roots well. Can someone help me understand? Example 1 is the square root of 9
Vilka [71]
A square root is doing the opposite of squaring. Squaring is multiplying a number by itself. Square rooting is trying to figure out what number squares into the number you have currently.
For your Example 1, the square root of 9 is 3.
3 x 3 = 9.
Some better examples are:
4 x 4 = 16.
4 is the square root of 16, and 16 is the square of 4.
7 0
3 years ago
the perimeter of a basketball court is 102 meters, and length is 6 meters longer than twice the width, what r length and width.
stepladder [879]
Perimeter = 2(l + w)

Thus,

102 = 2(l + w)

l = 6 + 2w

102 = 2( 6 + 2w + w)
102 = 12 + 4w +2 w
102 = 12 + 6w
90 = 6w

Thus, w = 15.

Length = 6 + 2w
= 6 + 30
= 36.

Thus, the length is 36 meters and width is 15 meters.
7 0
3 years ago
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