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Verdich [7]
3 years ago
10

Substitute and solve; 7(5f - 3n) -8 when n = 3 and f = 7

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
7 0

Answer:

174

Step-by-step explanation:

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Steve drove for 8 1/2 hours at 72 miles per hour. How much distance did he travel?
Pie

Answer:

He traveled 612 miles in total.

Step-by-step explanation:

You simply multiply the mph he was going to how long he traveled for. This gives us 72x8.5 equaling 612.

7 0
3 years ago
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Two last help with math please and thanks!
12345 [234]
1st problem:
Use the Pythagorean theorem:
a^2+b^2=c^2
49+361=c^2
c^2=410
c=20.24
The answer is 20m

2nd problem:
First calculate the height using the Pythagorean theorem:
a^2+b^2=c^2
20^2+b^2=625     (i got 20 {radius} by half-ing the base edge length)
400+b^2=625
b^2=225
b=15

Next, solve for the volume:
V=a^2*h/3
V=40^2*15/3
V=1600*5
V=8000

The answer is the second choice or B.

5 0
3 years ago
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Matt he bought five book he needed 9 how many more he needed
Dimas [21]

Answer:

5

Step-by-step explanation:

4 0
3 years ago
Y = f(x) = 25x<br><br> Find f(x) when x= 1/2
Ray Of Light [21]

Answer:

12.5

Step-by-step explanation:

f of x just means y, so you're just finding y when x = 1/2

7 0
3 years ago
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CINDY made costume decorations. She used 1/10 of a meter of ribbon for each decoration which she got by cutting 3/10 of a meter
Brilliant_brown [7]

Answer:

Cindy made 3 decorations with the ribbons

Step-by-step explanation:

Since Cindy used 1/10 of a metre of ribbon to make just one decoration that she obtained by dividing 3/10 of a meter of ribbon into equal parts, then we can calculate the number of decorations that Cindy made. In this scenario, all we need is an idea on how to divide fractions and we are good to go.

If Cindy used 1/10 of a metre obtained by dividing 3/10 of a metre of ribbon to make decorations, then the number of decorations she made can be gotten by dividing 3/10 by 1/10

i.e 3/10 ÷ 1/10

= 3/10 × 10/1

= 3 decorations.

That is she used 1/10 + 1/10 + 1/10 = 3/10 to make (3 decorations).

3 0
3 years ago
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