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3 years ago

10

It takes a rocket 30 seconds to travel 1 mile above the earth’s surface and 1 1/2 minutes to travel 6 miles. What is the rate of

change per second for the entire trip?
What is the rate of change for the same rocket to complete is trip after the first mile?

1 answer:

cupoosta [38]3 years ago

8 0

Answer:

0.067 mps should be your answer

Step-by-step explanation:

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And this one too please and thank u.

inn [45]

Answer:

$( - 4 \\ - 3$

Step-by-step explanation:

4unity to the left

3unity down

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3 years ago

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natima [27]

6.4$

Solution:

Divide 40 and 100(there must always be 100 when solving percentage) then it would be equal to 0.4

after it Multiply it to 16

so we get 6.4.

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2 years ago

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1 - 2x = -x - 3 what is the answer?

cricket20 [7]

Isolate the variable x.
1-2x=-x-3
1=x-3
x=4

4 0

3 years ago

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Oof I am really confused on 13. Can someone help me with it? I’ll really appreciate it. Thanks!

Nataly [62]

Hi! I know for sure that a and d are equivalent to the expression which is not what you are looking for. This is because 11 times 8 gives you the 88 on a and if you multiply the 5 also by 8 you get 40 so a is not the answer. The reason I multiply both by the same number and got the equivalency is because, "What you do to one side, you do to the other." Same thing with d. My answer would be B because you can't change the variable to a different number. You can't just give the five the y and make it mean the same. The answer is B.

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3 years ago

helena needs 3.5 cups of flour per loaf of bread and 2.5 cups of flour per batch of muffins. she also needs 0.75 cup of sugar pe

tatuchka [14]

The <em><u>correct answer</u></em> is:

She can make 2 loaves of bread and 4 batches of muffins.

Explanation:

Let b represent bread and m represent muffins.

The equation for the amount of flour she needs is 3.5b+2.5m=17.

The equation for the amount of sugar she needs is 0.75b+0.75m=4.5.

To solve this, we will want to eliminate one of the variables. To do this, we will make the coefficients of one of the variables the same. If we multiply 2.5 by 0.3, we get 0.75; this is what we will do to the first equation:

$\left \{ {{0.3(3.5b+2.5m=17)} \atop {0.75b+0.75m=4.5}} \right. \\ \\\left \{ {{1.05b+0.75m=17} \atop {-(0.75b+0.75m=4.5)}} \right. \\ \\0.3b=0.6 \\ \\\frac{0.3b}{0.3}=\frac{0.6}{0.3} \\ \\b=2$

She can bake two loaves of bread.

Substituting 2 for b in the first equation, we have

3.5(2)+2.5m=17

7+2.5m=17

Subtract 7 from each side:

7+2.5m-7=17-7

2.5m=10

Divide both sides by 2.5:

2.5m/2.5 = 10/2.5

m = 4

She can bake 4 batches of muffins.

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4 years ago

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