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mojhsa [17]
2 years ago
5

At a used book sale, 4 books cost $20. What is the cost per book? * HELP PLZZZZZZZZZZZZZZZZZZ

Mathematics
2 answers:
Nat2105 [25]2 years ago
6 0

$5

If you have 4 books and the total cost is $20, divide!

20/4 = 5

ad-work [718]2 years ago
6 0
Answer: 5




Explication: If you have 5 and 4 than you have to multiply them. See here, you have 5x4. 5x4= 20
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Lue is rolling a random number cube.the cube has six sides and each one is labeled with a different number 1 through 6.what is t
Pani-rosa [81]
The probability is 1/36.

since the cube is numbered 1-6, the only way to roll a 12 is by getting 2 six’s.

1/6 • 1/6 = 1/36
6 0
3 years ago
Pythagoras question plz help
motikmotik
From the two right triangles, you can write the following equations using the Pythagorean theorem. Let's call that shared leg in the middle "y"

y^2 + b^2 = a^2
y^2 + c^2 = x^2


y^2 + b^2 = a^2
re-write this to get "y" alone for substitution.
y^2 = a^2 - b^2
substitute (a^2 - b^2) for y^2 in the other equation. y^2 + c^2 = x^2

a^2 - b^2 + c^2 = x^2

Now put in the values given for a,b,c to solve for x

(7.1)^2 - (5.6)^2 + (5.7)^2 = x^2
51.54 = x^2
square root
7.2 = x


6 0
3 years ago
What is the value of x?
denis-greek [22]

Answer:

x = 17

Step-by-step explanation:

Hi there!

Because this is an isosceles triangle, we know that the angles measuring (x+17°) and (4x+34°) are congruent. Knowing this, we can set up the following equation and solve for <em>x</em>:

x+17 = 4x-34

17 = 3x-34

0 = 3x-51

3x = 51

x = 17

Therefore, the value of <em>x</em> is 17.

I hope this helps!

8 0
2 years ago
Read 2 more answers
3.
Lady_Fox [76]
他們會被當了總統寶座的法老時代就開始有個去的話讓
5 0
2 years ago
Answer this pls fast ASAP
Katarina [22]

Answer:

14.13 units^2.

Step-by-step explanation:

The area of a circle is found by doing pi * r^2. In this case, the diameter is 6. 6 / 2 = 3. So, r = 3.

pi * 3^2 = pi * 9 = 9pi.

This is a semicircle, so the area will be half of the whole circle.

9pi / 2 = 4.5 * pi = 4.5 * 3.14 = 14.13 units^2.

Hope this helps!

4 0
3 years ago
Read 2 more answers
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