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lesya692 [45]
3 years ago
6

alex worked at the library 4 hours each night for 20 nights. he earned a total of $640. how much did he earn per hour working at

the library?
Mathematics
1 answer:
bazaltina [42]3 years ago
4 0
He earned $8 an hour. I hope this helped!
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Winston has $200. He spends 20% of his money on a pair of shoes. how much money did he spend on the pairs of shoes?
masha68 [24]

Answer:

$40

Step-by-step explanation:

200 - 20% = 160

200 - 160 = 40

3 0
2 years ago
When Eric multiplied two binomials together, his result was a trinomial. An example is
leva [86]

Answer:

(x + 4)(x - 4)

Step-by-step explanation:

There are actually quite a lot of pairs of binomials the disproves Eric's conclusion, but they all model after the same special product: a^2 - b^2.

The special product a^2 - b^2 can be factored into (a + b)(a - b) and for all real a and b, it will come out as a binomial.

Here is an example:

(x + 4)(x - 4)

We can use the distributive property to get:

x^2 - 4x + 4x - 16

which is the same as

x^2 - 16

This would disprove Eric's conclusion.

6 0
3 years ago
HELP ME PLEASE
Harlamova29_29 [7]

Answer:

Repeats itself

Has a minimum or maximum

Multiplying by the same number

Step-by-step explanation:

8 0
3 years ago
A parallelogram has a 7 inch side and a 9 inch side, and the longer diagonal is 14 inches long. find the length of the other dia
Orlov [11]
A parallelogram is a flat shape with opposite sides parallel and equal in length. The diagonals of a parallelogram bisect<span> each other. In simpler words, they intersect halfway point. We calculate as follows:

</span>d2 = √<span>2a^2 + 2b^2 - d1^<span>2
</span></span>d2 = √2(7)^2 + 2(9)^2 - 14^2
d2 = 8 inches
7 0
3 years ago
Read 2 more answers
There are 83 species of butterflies at a butterfly world. That is 38 more than 5/6 of the species x, found in Florida. Which equ
Brilliant_brown [7]

<em><u>The equation to determine the number of species in florida is:</u></em>

38 + \frac{5}{6}x = 83 \text{ or } \frac{5}{6}x = 45

<em><u>Solution:</u></em>

Given that,

There are 83 species of butterflies at a butterfly world

That is 38 more than 5/6 of the species x, found in Florida

<em><u>To find: Equation used to determine the number found in Florida</u></em>

From given statement,

83 species of butterflies = 38 more than 5/6 of the species x

Which can be written mathematically as,

83 = 38 + \frac{5}{6} \times x\\\\38 + \frac{5}{6}x = 83

Thus the equation to determine the number of species in florida is found

Let us solve the equation

\frac{5}{6}x = 83-38\\\\\frac{5}{6}x = 45\\\\5x = 45 \times 6\\\\5x = 270\\\\x = 54

Thus 54 species is found in florida

4 0
3 years ago
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