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lilavasa [31]
2 years ago
11

Anna got 45 answers correctly out of an unknown number of questions

Mathematics
1 answer:
gizmo_the_mogwai [7]2 years ago
8 0

Answer:

The answer for this problem would be 50.

Step-by-step explanation:

If you calculate 90% of 50, you should get 45 so, the answer is 50.

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(8x – 20)-16 =10x+51
Lemur [1.5K]

When solving this equation, you get the answer as -43.5.

To solve, we simply need to collect like-terms and then rearrange to get x on one side and numbers on the other:

(8x - 20) - 16 = 10x + 51

8x - 36 = 10x + 51

- 8x

-36 = 2x + 51

- 51

-87 = 2x

÷ 2

-43.5 = x

I hope this helps!

6 0
3 years ago
Which of the following statements have the same result? Explain each step in solving each one.
Tatiana [17]

Answer:

I don't think that there is two same results. sorry I couldn't help

Step-by-step explanation:

for I the answer should be 10 if you replaced each x by 2. f(2) = 3(2) + 4

and for II it will be f-1(4) = 3-1(4) - 4 /5 the answer will be -1.

for III it should be y = 8 or 4

3 0
3 years ago
I don't understand help please :(
Sonbull [250]
This means that 10% of the total number of chickens Cam has is 11. If 10% of a number is 11, 100% of the chickens should be 110.
7 0
2 years ago
Over what interval is the graph of f(x) = –(x + 8)2 – 1 decreasiang<br><br><br><br> help
Degger [83]
Please use " ^ " to denote exponentiation:  

<span>f(x) = –(x + 8)^2 – 1 
Find the first derivative:  f '(x) = -2(x+8)(1)
Set this = to 0:  -2(x+8) = 0
solve for x:  x = -8
Divide the number line into subintervals based upon x=-8:

(-inf, -8) and (-8, inf)

Choose a test value for x from each interval, e. g., -10 from the first interval and 20 from the second.

Subst. this test value into the derivative, shown above.

If the result is + the function is incr on that interval; if - the fn. is decr.

Questions welcome!</span>
5 0
3 years ago
8x83x8303x838x83x9993x93939x99393
Zolol [24]

Answer:

3.5778559e+25

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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