3 years ago

4(x−2+y) It's for khan academy

Mathematics

1 answer:

inessss [21]3 years ago

4 0

The answer is 4x-8+4y i think?

You might be interested in

Match the number with its opposite.

jenyasd209 [6]

A. -1.3
B. 4.5
C. -5.4
D. 3.1

4 0

3 years ago

Read 2 more answers

6/7k=6 i really need help

crimeas [40]

So k=1000 like 4k=4 000 so 6/7 of a thousnad =0.857142857 so times 6=0.857142857

4 0

3 years ago

Read 2 more answers

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

3 years ago

Which angles are complementary to each other, will give brainliest

gayaneshka [121]

3 nd 4

Step-by-step explanation:

hope this helps

8 0

3 years ago

Need help pleaseㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ

Rudik [331]

the domain is all the real numbers, or (-infinite <x<infinite)

the range is y>=-4

axis of symetry is x= -1

vertex is (-1,-4)

the parabola opens upwards

x intercepts (-3,0) and (1,0)

y intercepts (0,-3)

5 0

2 years ago