3 years ago

S+2m=20 s-5=m substitution

Mathematics

1 answer:

xxTIMURxx [149]3 years ago

7 0

Answer:

s = 10

Step-by-step explanation:

s + 2(s - 5) = 20

s + 2s - 10 = 20

s + 2s - 10 + 10 = 20 + 10

s + 2s = 30

3s = 30

3s/3 = 30/3

s = 10

You might be interested in

Which equation has infinitely many solutions?

SpyIntel [72]

The answer is b the second one

5 0

3 years ago

the area of a square whose sides have length x cm is increasing at the rate of 12cm²/s. how fast is the length of a side increas

katovenus [111]

Answer:

0.67 cm/s

Step-by-step explanation:

The area of a square is given by :

$A=x^2$ ....(1)

Where

x is the side of a square

$\dfrac{dA}{dt}=12\ cm^2/s$

Differentiating equation (1) wrt t.

$\dfrac{dA}{dt}=2x\times \dfrac{dx}{dt}$

When A = 81cm², the side of the square, x = 9 cm

Put all the values,

$12=2\times 9\times \dfrac{dx}{dt}\\\\\dfrac{dx}{dt}=\dfrac{2}{3}\\\\\dfrac{dx}{dt}=0.67\ cm/s$

So, the length of the side of a square is changing at the rate of 0.67 cm/s.

4 0

2 years ago

Which of the following is not an empirical formula?<br> O C8H10N402<br> O C3H8<br> OMg3N2<br> O H2O

GalinKa [24]

Answer:

d..

Step-by-step explanation:

5 0

3 years ago

Competition is most intense between closely related species that __________. have different beak sizes use different resources u

kupik [55]

Competition is most intense between closely related species that use the same resources, as both species are competing for these limited resources.

3 0

3 years ago

What is a in the quadratic eqation if the points are (3,-30), (5,0), (7,70), (9,180)

LenaWriter [7]

Very very simple so back in my day when people have been wondering on this app waddling and waddling they think they can do it when they go it is the easiest of the easiest way for me a duck rubber kind intact it is 15

7 0

3 years ago