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Butoxors [25]
3 years ago
9

8TH GRADE MATH PLEASE HELL

Mathematics
2 answers:
Elanso [62]3 years ago
6 0

Answer:

i cant really see it ?

Step-by-step explanation:

IrinaK [193]3 years ago
4 0

Answer:

Step-by-step explanation:

x+21=133 (ext.∠)

x=112

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Pls help meeee!<br> and show work and explain so I can understand better.
olchik [2.2K]

Answer:

806 meters

Step-by-step explanation:

3 0
3 years ago
Plzzzz help asap
vlabodo [156]
(x,y) or
(x,f(x))
so just plug the first value in and see if yo get the 2nd value


A. when x=-2, then is f(x)=48?
remember, x^-m=1/(x^m)
3(1/4)^-2=3/((1/4)^2)=3/(1/16)=3*16=48
true

B. x^0=1
so 3(1/4)^0=3(1)=3
true

C. when x=2
3(1/4)^2, 3(1/16), 3/16
true

D. 12
das is obviously false but anyway
3(1/4)^12=3(1/big number)=3/big number=small number but not zero



answer is A,B,C
5 0
3 years ago
How do I find 45% of 320 by multiplying?
Juliette [100K]
1. We assume, that the number 320 is 100% - because it's the output value of the task. 
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 320 is 100%, so we can write it down as 320=100%. </span>
<span>4. We know, that x is 45% of the output value, so we can write it down as x=45%. </span>
5. Now we have two simple equations:
1) 320=100%
2) x=45%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
320/x=100%/45%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 45% of 320

320/x=100/45
<span>(320/x)*x=(100/45)*x       - </span>we multiply both sides of the equation by x
<span>320=2.22222222222*x       - </span>we divide both sides of the equation by (2.22222222222) to get x
<span>320/2.22222222222=x </span>
<span>144=x </span>
x=144

<span>now we have: </span>
<span>45% of 320=144</span>
7 0
3 years ago
Read 2 more answers
If x^2 -7x=30 and x&gt;0, what is the value of x-5
laila [671]

Answer:

5

Step-by-step explanation:

x^2-7x=30

x^2-7x-30=0

a = 1, b = -7, c = -30

sqrt(b^2-4ac)

sqrt(49+120)

sqrt(169)

13

-b +/- 13

7 + 13 = 20

7 - 13 = -6

2a = 2

20/2 = 10

-6/2 = -3

we know x>0, so it cant be -3. so now its just 10 - 5

3 0
3 years ago
What is this ???????????
mezya [45]

Answer:

The heavier an object the harder it is to move.

Step-by-step explanation:

I'm pretty sure this is it

5 0
3 years ago
Read 2 more answers
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