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erastovalidia [21]
3 years ago
13

I need help with #21

Mathematics
1 answer:
maksim [4K]3 years ago
7 0

Answer: x=9

Step-by-step explanation:

(5x+7)

5 x 9 = 45

45 + 7 = 52

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A fish swins 12 miles upstream in 4 hours. The return trip only takes 3 hours. Find the rate of the current
Gre4nikov [31]

Answer:

1/2 mph

Step-by-step explanation:

Given :

Distance traveled, D = 12 miles

Upstream Swim time = 4 hours

Return swim time = 3 hours

Upstream rate = 12/4 = 3 mph

Return rate = 12/3 = 4 mph

Let

swim rate = s

Current rate = c

s - c = upstream rate

s + c = return rate

s - c = 3 - - - (1)

s + c = 4 - - -(2)

From (1)

s = 3 + c

Put into (2)

3 + c + c = 4

3 + 2c = 4

2c = 4 - 3

2c = 1

c = 1/2 mph

Hence, rate of current = 0.5mph

6 0
3 years ago
A researcher compared the heights and shoe sizes for 50 men, selected at random. The equation shown describes a line of best fit
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3 0
3 years ago
As one of the grade 9 top performing students competing for the “Boy Scout of the Year” award, you are assigned by your scoutmas
Darina [25.2K]

Answer:

Yes you would know

Step-by-step explanation:

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After this we calculate the interior angle of each side, and use our given 20m to calculate it.

5 0
2 years ago
How to convert this to a decimal
skad [1K]
Make it improper.
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96/25

make the bottom number 100
96× 4 25×4
384/100

simplify 3 and 84/100
3.84 is your answer
5 0
3 years ago
Read 2 more answers
if a right triangle has lengths 99 inches, 101 inches and 20 inches, what is the length of the hypotenuse
Anna35 [415]

Answer:

The hypotenuse is 10201

Step-by-step explanation:

20^2+99^2=101^2

400+9801=10201

10201=10201

5 0
3 years ago
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