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Nikitich [7]
2 years ago
8

Cassie has test grades of 71, 78 and 83 on the first three tests in her

Mathematics
2 answers:
Neporo4naja [7]2 years ago
3 0

Answer:

x ≥ 88

Step-by-step explanation:

In order to have at least an average of 80 after 4 tests, the sum of her scores must be at least 80 * 4 = 320 so we can write the following inequality:

71 + 78 + 83 + x ≥ 320

232 + x ≥ 320

x ≥ 88

Sphinxa [80]2 years ago
3 0

Answer:

Your correct answer to this problem is x ≥ 88

Step-by-step explanation:

71 + 78 + 83 + x ≥ 320

232 + x ≥ 320

= x ≥ 88

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10*5+10*5*1 I think this is the right way
8 0
2 years ago
Please help! Im not sure if this is counted as math but yeah please help!
Artyom0805 [142]

Answer:

1.543

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4 0
2 years ago
A train traveled 63.75 miles at a rate of 85 miles per hour. Which equation can be used to find h, the number of hours it took t
sashaice [31]

Answer:  63.75 = 85h

Solving gives 0.75 hours.

Step-by-step explanation:

we now that speed = distance / time

therefore time will be Distance / speed

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Time(h) = 63.75miles/ 85.---- equation 1

But from the options given, the equation that can also  be used to find number of hours is

63.75 = 85h

such that making h subject of formula  still give us

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8 0
2 years ago
30 points
s2008m [1.1K]

Answer:

A: You plot these points (-3,4) (-3,6) (-5,6) (-7,4)

B: The transformation would be described as a reflection over the y axis

C:  The transformation does result in a congruent figure because the shape doesn't change in size or shape and in length or width

Step-by-step explanation:

So our plots from the figure are: (3,4)  (3,6)  (5,6)  (7,4)

So using the rule (x, y) → (-x, y) are new points would be:

(-3,4)

(-3,6)

(-5,6)

(-7,4)

This rule (x, y) → (-x, y) is used for the type of transformation that is a reflection but over the y axis.

7 0
1 year ago
Adam is x years old. His father is 25 years older than Adam. His brother is 3 years younger than Adam. The brothers' ages added
djyliett [7]
F=x+25
b=x-3
x+b=25

b) x-3 +x =25
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x=14
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5 0
3 years ago
Read 2 more answers
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