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Yuri [45]
3 years ago
5

A student has scores of 64, 62, and 72 on his first three tests. He needs an average of at least 70

Mathematics
2 answers:
Effectus [21]3 years ago
7 0

Answer:

82

62 +64+72+82=280

280 divided four(#of scores given) = 70

so 82 is the forth score if the student wants a 70 in the class

kotegsom [21]3 years ago
3 0

Answer:

73 or more

Step-by-step explanation:

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BlackZzzverrR [31]
First, you set your problem up like this: 

-4x+3=2x-6

add 6 to both sides so it looks like this:

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add 4x to both sides so it looks like this:

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divide 6 from both sides so this is your answer:

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5 0
3 years ago
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Adrian says that 4(-9)= 36. Why is Adrian incorrect?
xenn [34]

Answer:

4(-9)= -36

Step-by-step explanation:

Since there's a negative on the 9 it will affect the product. So the answer is supposed to be a - 36.

4 0
2 years ago
Which is a better deal: five tulips for $3.00 or seven tulips for $4.00?
guajiro [1.7K]

Answer:

Step-by-step explanation:

7 divided by $4.00 = $1.75/per tulip

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5 0
3 years ago
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The ratio of tom’s age to Mary’s is 3:4.If Tom is 15 how old is Mary
AnnZ [28]
Hey there!

Tom's age to Mary's is 3:4; an equivalent ratio is 15:x (x symbolizes Mary's age).

To solve for this, we need to divide our proportions. By that, I mean divide Tom's older age by his younger age. If we do so, we should get a scale factor that we can multiply Mary's younger age by.

15 / 3 = 5

This means that the scale factor of the ages is 5.

x / 4 = 5 (Solving for Mary's unknown age.)

To solve for x, multiply both sides by 4.

x/4 * 4 = x
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I hope this helps!
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Your answer is 62.5. Hope i helped
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3 years ago
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