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Zinaida [17]
3 years ago
15

Find a value of 21 + 4(3^2 -5)

Mathematics
1 answer:
Svetllana [295]3 years ago
7 0

the following answer to this question is 37.

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Please help I am horrible at math! Ye is riding home from a friend's house. After 5 minutes he is 4 miles from home, after 15 mi
vesna_86 [32]

Answer:

<em>y=-0.2x+5. Correct choice: A)</em>

Step-by-step explanation:

<u>Modeling With Equations</u>

Let's call x the number of minutes and y the distance from home. The correct model should meet both conditions:

After 5 minutes, Ye is 4 miles from home. This is the ordered pair (5,4)

After 15 minutes, Ye is 2 miles from home. This is the ordered pair (15,2)

A) y=-0.2x+5. Testing the first point (5,4): y=-0.2*5+5=4. Correct

Testing the second point (15,2): y=-0.2*15+5=2. Correct

This is the correct choice.

B) y=11/7x-27/7. Testing the first point: (5,4) y=11/7*5-27/7=4. Correct

Testing the second point (15,2). y=11/7*15-27/7=138/7. Incorrect

Incorrect choice.

C) This equation is equal to the choice B), thus this one is incorrect.

D) y=5x-0.2. The first point (5,4) yields to:

4=5*5-0.2=24.8 Incorrect.

6 0
3 years ago
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2 5/8 as a rational number ??
arlik [135]

Answer:

It's already a rational number?

Step-by-step explanation:

A rational number is any number that can be written as a fraction/ratio, and 2\frac{5}{8} is certainly a fraction. If you meant 2\frac{5}{8} as a decimal, then it'd be 2.625.

6 0
2 years ago
What happens when an inequality expression is divided by the same number. Does the sign stay the same each time or change direct
irga5000 [103]
The sign only changes when divided or multiplied by a negative number.
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Joanne is charged a base rate of $40.00 each month for her cell service. She upgrades her phone and chooses to make 18 monthly p
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Has anyone answered this ?
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Mandy collected 4 times as many shells as Cameron. Together they collected 40 shells. How many shells did Mandy collect. Write a
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10, because 40 divided by 4 is ten
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