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Sever21 [200]
2 years ago
6

!!help!! pls :((( im so confused pls help

Mathematics
2 answers:
Andrej [43]2 years ago
7 0

I only know the first one with the method Emmanuel is doing sorry ;(

at least there's a guide in this image

SVEN [57.7K]2 years ago
5 0

Step-by-step explanation:

for some reason the equation at the top says 7(x+2) but both of the equations at the bottom say 7(x-2)... I'm just going to do 7(x-2)

Emmanuels Work:

7(x-2)=91

distribute the 7 by multiplying both x and -2 by it

7x-14=91

add 14 to both sides

7x=105

divide both sides by 7

x=15

Mauricio's Work:

7(x-2)=91

to get rid of the 7 multiplication, divide both sides by 7

x-2=13

add 2 to both sides

x=15

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A circular cloud of poison gas from a factory explosion is expanding so that t hours after the explosion the radius of the cloud
diamong [38]

Answer:

6000π m²/h

Step-by-step explanation:

Area of the circular cloud =πr²----------------------------------------- (1)

Radius as a function of time = R(t)=50+20t------------------------ (2)

dA/dt = (dA/dr) x (dr/dt)-----------------------------------------------------(3)

dA/dr  =  2πr

dr/dt   = 20

After 5 hours, the radius of the cloud will be :

R(5)=50+20(5)

     =   150 meters

Substituting into (3)

dA/dt =   2π(150)  x 20

         =   6000π m²/h

3 0
3 years ago
PLZZZ HELPPPP WILL MARK BRAINLIEST
ehidna [41]

Answer: 1

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4 0
3 years ago
Graph the function f(x)=2(2)^x for -3<=x<=2.
EastWind [94]
See attached graph (from -4<=x<=2 )

The y-intercept is the multiplier to the exponential, i.e. 2.

The graph goes from (-3,1/4) to (2, 8), so the range in interval notation is [1/4,8] 

If f(x)=2(3^x), then the y-intercept stays the same at 2.  The graph goes from (-3, 2/27) to (2,18), and the corresponding range will be [2/27, 18].
See second graph for more information.

7 0
4 years ago
What is the nth term of 1,3,6,10,15,21
bija089 [108]

Answer:

1,3,6,10,15,21,…..

These are all the sum of natural numbers upto the n

So, in this series

1st Term = 1

2nd Term = 1+2 = 3

3rd Term = 1+2+3 = 6

4th Term = 1+2+3+4 = 10

So,

Term - n = 1+2+3+….+n = n(n+1)/2

That’s your answer n(n+1)/2

Good Luck

Step-by-step explanation:

8 0
4 years ago
May someone plz help me I have been stuck on this for a day
zysi [14]

Answer:

The concluding part

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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