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luda_lava [24]
3 years ago
15

A train travels 16 miles in 20 minutes At this rate , how many minutes will it take to trace 12 miles?

Mathematics
1 answer:
umka2103 [35]3 years ago
8 0

Answer:

15 minutes

Step-by-step explanation:

You must find the unit rate.

You can find this by dividing 16 miles by 20 minutes

This formula would find how many per minute

The answer would be .64 miles per minutes.

Then Multiply .64 by 12 which would give you the answer of 7.68

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A circle has a diameter of 46 cm. What is its radius?
Margaret [11]

Answer:

Step-by-step explanation:

radius = diameter/2 = 46cm/2 = 23 cm

4 0
3 years ago
Jim has only dimes and nickels in his coin bank. He has 37 coins with a total value of $2.65.
guajiro [1.7K]

Answer:

21

Step-by-step explanation:

Let x represent the number of dimes and y represent the number of nickels.  The total number of coins is 37; this gives us the equation

x+y = 37

Each dime is worth ten cents, or 0.10, and each nickel is worth five cents, or 0.05.  The total amount of money is given by

0.10x+0.05y = 2.65

This gives us the system

\left \{ {{x+y=37} \atop {0.10x+0.05y=2.65}} \right.

To solve this, we will use substitution.  We will isolate x in the first equation:

x+y=37

Subtract y from each side:

x+y-y = 37-y

x = 37-y

Substitute this into the second equation:

0.10(37-y)+0.05y = 2.65

Using the distributive property,

0.10(37)-0.10(y)+0.05y = 2.65

3.70-0.10y+0.05y = 2.65

Combining like terms,

3.70-0.05y = 2.65

Subtract 3.70 from each side,

3.70-0.05y-3.70 = 2.65-3.70

-0.05y = -1.05

Divide both sides by -0.05:

-0.05y/-0.05 = -1.05/-0.05

y = 21

There were 21 nickels.

4 0
2 years ago
Read 2 more answers
I need help with this question
Feliz [49]

Answer:

B = 5 and F = 5

Step-by-step explanation:

Step 1: B = 5 because 350(5) = 1750

Step 2: F = 5 because 525(5) = 2625

Step 3: 2625 +  1750 = 4375

8 0
2 years ago
Right now, I am adding fractions, what number can you use to simplify 55/48?
Brrunno [24]

You can't its already simplified


5 0
3 years ago
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The area of a rectangle is 27m and the length of the rectangle is 3m less then twice the width. Find the dimensions of the recta
Zielflug [23.3K]

Answer:

w = 4 1/2

l = 6

Step-by-step explanation:

w = width

2w-3 = length

A = lw

27 = w(2w-3)

27 = 2w² - 3w

subtract 27 from each side:

2w² - 3w - 27 = 0

factor:

(2w-9)(w+3) = 0

solve each for 'w':

w = 9/2

w = -3  (This answer can be discounted because a length cannot be negative)

width = 9/2

length = 2(9/2) - 3 which is 6

5 0
3 years ago
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