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Kisachek [45]
3 years ago
13

If x = 6, what is the value of 4x2 - 7? O A. 151 B. 137 C. 571 D. 172

Mathematics
2 answers:
Elan Coil [88]3 years ago
6 0

Answer:

B. 137

Step-by-step explanation:

Assuming by 4x2 you meant 4x^{2}, you plug in the 6 into x.

After, you would square 6, giving you 36.

Then you multiply 36 by 4, getting 144

All that's left to do is subtract 7 from 144 and ending with 137.

aalyn [17]3 years ago
5 0

Answer: B

Step-by-step explanation: 6^2 = 36

36*4= 144

144-7= 137

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Whats -7/3(x-1)+2=4(2-x) equals
olga55 [171]
Expand: -7/3(x-1)+2: 13/3-7x/3
expand: 4(2-x): 8-4x
13/3 - 7x/3 =8-4x
13/3 -7x/3 -13/3 = 8-4x -13/3
-7x/3=-4x+11/3
-7x/3 * 3= -4x*3+11/3*3
-7x=-12x+11
-7x+12x=-12x+11+12x
5x=11
5x/5=11/5
x=11/5

3 0
3 years ago
Help and show your work
OLga [1]

Answer:

-3=k y=24

Step-by-step explanation:

y=kx.

-18=k(6)

k=-3.

So our value of k is -3 now, let solve for y.

y=kx

y=(-3)(-8)

y=24

3 0
3 years ago
A lawn care service charges a $15 equipment fee plus $10 per hour. For x number of hours, they charge y=10x+15 . Susan found a d
rusak2 [61]

Answer:

$$$$$$$$                      the anwser is 4 i think thats how you solve it

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
-{1-2[10-(-1-5)²]}<br><br> ASAP<br><br> I got -53 is it right?
Sauron [17]

Answer:

You are correct the answer is -53

Step-by-step explanation:

So you first add -1 and -5

Which is -6

-6 to the second power is 36

36 times - is -36

10-36 is -26

Then it is multiplied by -2

Thus 52

Add 1 to 52 which is 53

53 times - is -53

Thus you are correct

7 0
3 years ago
1. 172,900,000 how can u convert this number into scientific notation​
trapecia [35]

Answer:

1.72900000 X 10 to the eighth power

Step-by-step explanation:

6 0
4 years ago
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