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3 years ago

14

A student earns scores of 80, 87, and 82 on the first three of four tests. If the student wants to achieve a quiz average of 85,

what score must she achieve on the last quiz?

1 answer:

aleksandrvk [35]3 years ago

5 0

Answer:

91

Step-by-step explanation:

85= $\frac{80+87+82+x}{4}$ then multiply the 4 over and subtract 80, 87, and 82 to find x which gives you 91

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Simplify the following

irga5000 [103]

$\huge\fbox{Answer ☘}$

$\bold\blue{( - 8z) {}^{2} } \\\bold{ = > 64z {}^{2} }$

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2 years ago

The height, h, of a falling object t seconds after it is dropped from a platform 300 feet above the ground is modeled by the fun

notka56 [123]

Average rate = [h(3) - h(0)]/(3 - 0)
h(3) = 300 - 16(3)^2 = 300 - 16(9) = 300 - 144 = 156
h(0) = 300 - 16(0)^2 = 300

average rate = (156 - 300)/3 = -144/3 = -48

Therefore, the object falls with an average rate of 48 ft/s during the first 3 seconds.

4 0

3 years ago

The length of a swimming pool is 4 feet longer than 2 times its width. If the perimeter of the pool is 128 feet, what is the wid

alexandr1967 [171]

P = 2(L + W)
P = 128
L = 2W + 4

128 = 2(2W + 4 + W)
128 = 2(3W + 4)
128 = 6W + 8
128 - 8 = 6W
120 = 6W
120/6 = W
20 = W <=== width is 20 ft

L = 2W + 4
L = 2(20) + 4
L = 40 + 4
L = 44 <=== length is 44 ft

5 0

3 years ago

0.12 times 0.08 divided by 2.40

blagie [28]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

HELPP PLEASE ASAP Use the Pythagorean theorem to find the missing length in the right triangle

qwelly [4]

Answer:

c = 10

Step-by-step explanation:

The pythagoras theorem :

a² + b² = c²

a = 6 and b = 8

6² + 8² = c²

36+64 = c²

100 = c²

c = √100

c= 10

Hope this helped and brainliest please

3 0

2 years ago