4 years ago

If 2s +10r = 2(2s-5r) = 42, then what is the value of r?

Mathematics

1 answer:

Lesechka [4]4 years ago

5 0

R=7/5
You can list two equations:
2s+10r=42 and 4s-10r=42.
Then try to delete S, you will get r

You might be interested in

525 + ( -525.50) = 0

strojnjashka [21]

Answer:

This is true because the + and the - will turn into a negative, therefore it will stay zero

Step-by-step explanation:

+ (-x) = -x, NOT +x

7 0

3 years ago

Nora measured a community college and made a scale drawing. She used the scale 3 millimeters : 2 meters. If a building at the co

ikadub [295]

Answer:64 Meters

Step-by-step explanation:

8 0

3 years ago

A mountain climber ascends hundred feet per hour from his original position. after six hours is fine opposition is 11,600 feet a

Evgen [1.6K]

Answer:

Original position =6,800 feet.

800 (ft per hour) x 6(hours) =4800 ft

11,600-4,800=6,800 feet

Step-by-step explanation:

8 0

3 years ago

A cube measures 3.0 CM on each side and has a mass of 25g. What is the density?

Oxana [17]

Answer:

D ≈ 0.925926 g/cm³

Step-by-step explanation:

Density = Mass / Volume

Step 1: Define

M = 25 g

V = (3 cm)³ = 27 cm³

D = ?

Step 2: Substitute and Evaluate for Density

D = 25g / 27 cm³

D = 25/27 g/cm³

D ≈ 0.925926 g/cm³

8 0

4 years ago

This one too pleaseeeeee

Orlov [11]

Sure thing!
Length = 14 in
Area = 294 in^2

3 0

3 years ago