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Arisa [49]
3 years ago
5

3/8=a/2= 15/bfind a and b​

Mathematics
2 answers:
Studentka2010 [4]3 years ago
7 0

Answer:

Step-by-step explanation

\frac{3}{8}=\frac{a}{2}\\\\\frac{3}{8}*2=a\\\\a=\frac{3}{4}\\\\\\\frac{3}{8}=\frac{15}{b}\\\\  3*b=15*8\\\\b=\frac{15*8}{3}\\\\b=5*8\\\\b=40

shutvik [7]3 years ago
5 0

Answer:a=3/4 and b=40

Step-by-step explanation:

To find 3/8=a/2=15/b

Firstly find a

3/8=a/2

Cross multiply

8a=3×2

8a=6

a=6/8

a=3/4

To find b

a/2=15/b

Where a=3/4

3/4/2=15/b

3/8=15/b

Cross multiply

3b=120

b=40

a=3/4 and b=40

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Car A travels 702 miles on 12 gallons of gasoline car b travels 873 miles and 15 gallons of gasoline David wants to buy a car wi
Assoli18 [71]

David should buy Car A because it covers more miles in one gallon than Car B

Step-by-step explanation:

Given

Distance traveled by Car A = d_A = 702\ miles

Gallons used by Car A = g_A = 12

Distance traveled by Car B = d_B = 873\ miles

Gallons used by Car B = g_B = 15

In order to find the distance traveled on one gallon, we will divide the total distance by number of gallons

So,

Distance traveled by Car A in one gallon = \frac{702}{12} =58.5\ miles\ per\ gallon

Distance traveled by Car B in one gallon = \frac{873}{15} = 58.2\ miles\ per\ gallon

We can see that Car A travels more distance in one gallon that is 58.5 miles per gallon

So,

David should buy Car A because it covers more miles in one gallon than Car B

Keywords: Fractions, Unit rate

Learn more about unit rate at:

  • brainly.com/question/9527422
  • brainly.com/question/9381523

#LearnwithBrainly

6 0
3 years ago
Determine the number of significant digits in the measurement 3.08 cm​
BabaBlast [244]
<h3>The measurement of 3.08 cm has 3 significant digits in it .</h3>

We say this because a measurement is considered significant if it has non zero numbers in it , which 3.08 cm has . And a measurement is considered a significant digit if it has zero between it's non zero digits . Hence we say that 3.08 cm has 3 significant digits .

7 0
3 years ago
Which graph represents the <br> equation below?<br> 7x – 2y = -10
Colt1911 [192]
The slope is the first choice you chose
7 0
3 years ago
Ben is 9 years younger than his brother Jeff. in 10 years, the sum of their ages will be 67 how old are they now​
Eddi Din [679]

Hey there! I'm happy to help!

Let's represent Ben's age with a B and Jeff's with a J in a few equations below.

B=J-9                               (Ben is 9 years younger than Jeff)

B+10+J+10=67                  (In 10 years, the sum of their ages will be 67)

We know that B is equal to J-9. So, in the second equation, we can replace B with J-9 to solve for J.

J-9+10+J+10=67

We combine like terms.

2J+11=67

We subtract 11 from both sides.

2J=56

We divide both sides by two.

J=28

And, we know that Ben is nine years younger than Jeff, so this means Ben is 19 years old.

Ben is 19 years old and Jeff is 28.

I hope that this helps! Have a wonderful day! :D

8 0
4 years ago
The length of a rectangle is three times its width. If the perimeter is at most 112 centimeters, what is its greatest possible v
Nana76 [90]

Answer:

Step-by-step explanation:

Perimeter= 2L+2W. If L=3W(three times the width) then 2(3W)+2W=112. Or 6W+2W=112 which is equal to 8W=112. To solve for the width, divide both sides by 8 and find 112/8=14, therefore W=14.

7 0
3 years ago
Read 2 more answers
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