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alexandr402 [8]
3 years ago
15

Which value must be added to the expression x^2 +16x to make it perfect-square trinomial?

Mathematics
2 answers:
Troyanec [42]3 years ago
6 0

Answer:

Its C on edg

Step-by-step explanation:

follow my ifunny "dankmemehistory"

Semmy [17]3 years ago
5 0
X^2 + 16x + ?
a^2 + 2ab + b
(a + b)^2 which is a perfect square.

To find b to determine the last value, you divide 16x by 2x.
so:
b = 8
the last value would be 8^2 which is 64.

Hence answer is C - 64
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Steve got his car fixed for $557. After taxes it cost him $594. What was the tax rate to the nearest %?
I am Lyosha [343]
You're nearly there. Just some more steps.
557 * x = 594 tells us 
x = 594 / 557 (divide both sides by 557)
x ≈ 1.066427

When we've found this number we must realise the following:
the '1' in this answer is the 100% the car fixing costs (without taxes)
the '0.66427' stands for the tax rate.

To find the tax rate we multiply 0.66427 by 100, which gives us:
0.66427 * 100 = 6.6427 ≈ 7

So, rounded to the nearest %, the tax rate is 7%
6 0
3 years ago
A supplier delivers an order for 20 electric toothbrushes to a store. by accident, three of the electric toothbrushes are defect
evablogger [386]
<span>3 of the 20 toothbrushes are defective, so the initial probability of selecting a defective toothbrush on the first try is 3/20. After that, there will be 2 defective toothbrushes in the remaining 19, so the probability of selecting one of those on the 2nd try will be 2/19. To get the probability of those two events happening sequentially, we multiply the two probabilities. Thus (3/20)*(2/19) = 6/380 = 0.0157, or about 1.6%.</span>
3 0
3 years ago
Thirteen divided by 1,690
enyata [817]

Answer:

130

Step-by-step explanation:

13 goes into 16 how many times - 1

subtract- you get 390

13 goes into 390 how many times?- 30

Your answer - 130

7 0
3 years ago
I need help like now please!!!!! simplify the expression : 7y + 3x + 3 - 2y + 6
Deffense [45]
Simplified: 3x+7y+(-2y)+9
Coefficient of y: 5
Constant: 3 and 6
4 0
3 years ago
Find the sum of the distinct prime factors of $5^5 - 5^3$.
grin007 [14]

The prime factorization is $2016=2^5\times3^2\times7$. Since the problem is only asking us for the distinct prime factors, we have $2,3,7$. Their desired sum is then $\boxed{\textbf{(B) }12}$.

5 0
3 years ago
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