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andrezito [222]
4 years ago
5

Sally had seventy - seven dollars to spend on eight books. After buying them she had thirteen dollars. How much did each book co

st ?
Helppp
Mathematics
1 answer:
guajiro [1.7K]4 years ago
6 0

Answer:

$8 each

Step-by-step explanation:

We know Sally has $77 to spend. She bought 8 books, and was then left with $13. First, let's subtract 13 from 77 to see how much it cost in total.

77 - 13 = 64

Now, to find out how many each book cost, we have to divide the total amount by how many books Sally got.

64 / 8 = 8

Each book cost $8.

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Find the value of x in a triangle . If the hypotenuse of the triangle is 10 , the opposite is x+2 and the adjacent is x.​
Sauron [17]

Answer:

x = 6

Step-by-step explanation:

using Pythagoras' identity in the right triangle.

the square on the hypotenuse is equal to the sum of the squares on the other 2 sides , that is

x² + (x + 2)² = 10² ← expand parenthesis on left side and simplify

x² + x² + 4x + 4 = 100 ( subtract 100 from both sides )

2x² + 4x - 96 = 0 ( divide through by 2 )

x² + 2x - 48 = 0

(x + 8)(x - 6) = 0 ← in factored form

equate each factor to zero and solve for x

x + 8 = 0 ⇒ x = - 8

x - 6 = 0 ⇒ x = 6

however, x > 0 , then x = 6

8 0
2 years ago
HELP PLEASE determine the number of real number solutions for the equation x^2+6x+9=0​
brilliants [131]

Answer:

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Step-by-step explanation:

To factor this out find the factors of 9 which add up to 6.

3 and 3 work therefore factor it out to

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Using Zero product property x is equal to -3

And there is only one answer which is 3

6 0
2 years ago
karas jug contains 2 quarts of apple cider.she fills 8 mugs with cider.each mug can hold six three fourths of fluid ounces.how m
bazaltina [42]
So first of all you need to know that in 1 quart there is 31.9995 ounces so since shes says there is 2 quarts lets do the math:)
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now lets subtract that from our 2 quarts or 63.999 ounces 
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so we have 33.999 fluid ounces left in the jar:)
hope this helps lol

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AleksandrR [38]
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by 17/40
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