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sammy [17]
3 years ago
13

At the bank of a river, by measurement, a = 9 ft., b = 15 ft., c = 12 ft., and d = 7 ft.How long is x?

Mathematics
1 answer:
Orlov [11]3 years ago
7 0

Answer: x is 20

Step-by-step explanation:

This is ratio

a : c = b : x and d : unknown

a : c = 9 : 12 = 3 : 4 which is 9/12

b : x = 15 : x which is 15 / x

So the proportion will be :

3/4 = 15/x

So Cross multiplying

3x = 90

Divide both side by 3

x = 90/3

x = 20

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Aliun [14]

Answer:

(1): "*-5x2y" was replaced by "*(-5x2y)".

(2): "x2"   was replaced by   "x^2".  1 more similar replacement(s).

STEP

1

:

Equation at the end of step 1

 (3x • (y2)) • (0 -  (5x2 • y))

STEP

2

:

Equation at the end of step

2

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 3xy2 •  -5x2y

STEP

3

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Multiplying exponential expressions :

3.1    x1 multiplied by x2 = x(1 + 2) = x3

Multiplying exponential expressions :

3.2    y2 multiplied by y1 = y(2 + 1) = y3

I believe the answer is   ( -3•5x3y3)

6 0
3 years ago
Justin runs 7 miles in 60 minutes. At the same rate, how many miles would he run in 24 minutes?
posledela

Answer:

2.8 Miles

Step-by-step explanation:

If 7m is 60mins

How many miles is 24 mins

solution:

take unknown miles to be 'x'

7m=60mins

Xm=24mins

cross multiply

7×24/60=2.8m

x=2.8miles

4 0
2 years ago
PLEASE HELP
igomit [66]

width = 10 feet → C

let l represent the length then width = l - 8

perimeter = 2(length + width) = 2(l + l - 8)

given perimeter = 56 then

2(2l - 8)= 56

divide both sides by 2

2l - 8 = \frac{56}{2} = 28

add 8 to both sides

2l = 28 + 8 = 36

divide both sides by 2

l = \frac{36}{2} = 18

thus length = 18 feet and width = 18 - 8 = 10 feet


7 0
3 years ago
What is &gt;&gt;&gt;&gt;&gt; -x&lt;15-2x
Gemiola [76]
-x
7 0
3 years ago
Which is the graph of the linear inequality 1/2x-2y&gt;-6y
kati45 [8]

Answer: Are you high school because GOD that looks hard to do.

Step-by-step explanation:

4 0
2 years ago
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