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victus00 [196]
2 years ago
6

X=a There were 120 problems.' You got two-fifths wrong. How many did you get right?

Mathematics
1 answer:
swat322 years ago
7 0

120 x 2 = 240

240/5 = 48

120 - 48 = 72

Answer is 72.

You got 72 correct.

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Evaluate 8y-10 for y=3
garri49 [273]
8 (3)-10
24-10=14
Hope this helped :)
6 0
3 years ago
The difference of the squares of two positive consecutive even integers is 7676. find the integers. use the fact​ that, if x rep
myrzilka [38]
Equation is (x+2)^2 - x^2 = 7676
solve the equation by first opening the bracket of (x+2)^2 by A^2 + 2AB +C^2 

you'll end up with 4x + 4 = 7672
thus x = 1918 and the next number is 1920.
5 0
3 years ago
Simplify (x^2 -25)/ (2x^2-7x-15)
murzikaleks [220]

Answer:

\frac{x+5}{2x+3}

Step-by-step explanation:

4 0
2 years ago
Using exponent laws please answer this
hram777 [196]

Answer:

  see below

Step-by-step explanation:

In addition to the exponent rule ...

  (a^b)^c = a^(bc)

it is helpful to know the first few powers of some small integers.

  5^3 = 125

  9^2 = 81

  4^3 = 64

  2^6 = 64

__

  1. 125^3 = (5^3)^3 = 5^(3·3) = 5^9
  2. 81^7 = (9^2)^7 = 9^(2·7) = 9^14
  3. (1/64)^3 = ((1/4)^3)^3 = (1/4)^(3·3) = (1/4)^9
  4. (1/64)^3 = ((1/2)^6)^3 = (1/2)^(6·3) = (1/2)^18
7 0
3 years ago
Garrett works for a company that builds parking lots the graph shows the area of a parking lot based on the length of one side.
dedylja [7]

Answer: Option D.

Step-by-step explanation:

this is a quadratic equation of the form:

y = ax^2 + bx + c

First, things you must see.

The graph opens up, so we must have thata a is greater than zero, so we can discard the first option.

Second, we can see that the vertex is located in x ≈ 70

The vertex of a quadratic equation is: x = -b/2a

so we have:

70 = -b/2a

let's try our options and see if we can discard other:

B:

-b/2a = 69.9/2 = 34.95

we can discard this option.

C:

-b/2a = 78/2 = 39 we can discard this option.

D:

-b/2a = 69.9/2*0.5 = 69.9

This is the only one that fits, so this is the correct option.

8 0
3 years ago
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