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sergeinik [125]
3 years ago
15

Find the length of x. Round to the nearest tenth, one decimal place.

Mathematics
1 answer:
azamat3 years ago
3 0
By the rules for secants,
.. AB*AC = AD*AE
.. 5*(5 +x) = 6*(6 +6)
.. 25 +5x = 72
.. 5x = 47
.. x = 9.4

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The diameter of a circle is 20 centimeters what is the length of radius blank centimeters edulastic
riadik2000 [5.3K]

Answer:

The diameter is 2 times the radius.

D=2r

Substitute 20 as the diameter and solve for r.

20=2r

Divide both sides by 2.

10=r

So, the radius is 10 centimeters.

:)

5 0
2 years ago
Sally goes to the store and buys a jackhammer for $25. The store is running a discount of 18%. The store has a sales tax rate of
tamaranim1 [39]

Answer:

Jackhammer =$25

Discount= 18%

Final Price= $25*0.82*1.06 = $ 21.73

5 0
2 years ago
Which of the following is an inequality sentence?
ziro4ka [17]

Answer:

C. x

Step-by-step explanation:

  • Option A [x+5=20]tells us that: When we add 5 to a variable x, we get 20. As it has a unique value for x and is completely equal to it(i.e. 15), It is an equality.
  • Option B[x=5] tells us that: A variable x equals to 5. Hence, as x is unique for 5 and is wholly equal to it, it's an equality too.
  • Option C[x tells us that: A variable x isn't 5 but lesser than it. As we cannot equate it to 5, nor we are given the nature of the variable x, it is an Inequality.
  • Option D[x+5] is an expression; It can't be called an equation or an inequality unless we relate it with another expression.

3 0
2 years ago
Read 2 more answers
Simplify the expression below <br><img src="https://tex.z-dn.net/?f=7x%20%7B%20-%20%7D%5E%7B2%7D%20%20-%204z%20%2B%208x%20%7B%20
Alisiya [41]

Answer: -9z + 15/x^2

The correct answer is -9z + 15/x^2 when simplified

<em>Hope this helps =)</em>

3 0
2 years ago
Hi! I just need somebody to explain how this is done.
iren2701 [21]

Answer:

Exact form: x = \frac{10.8}{sin(57)}

Rounded to the Nearest Tenth: x = 12.9

Step-by-step explanation:

<em>In the right-angled triangle, we can use the trigonometry functions to find the length of a side or a measure of an angle</em>

In the given figure

∵ ∠C is the right angle

∴ ΔACB is a right triangle

∵ m∠B = 57°

∵ AC = 10.8

∵ AC is the opposite side of ∠B

∵ AB is opposite to the right angle

∴ AB is the hypotenuse

∵ AB = x

→ We can use the function sine to find x

∵ sin∠B = \frac{opposite}{hypotenuse}

∴ sin∠B = \frac{AC}{AB}

→ Substitute the values of ∠B, AC, and AB in the rule of sine above

∴ sin(57°) = \frac{10.8}{x}

→ By using cross multiplication

∵ x × sin(57°) = 10.8

→ Divide both sides by sin(57°)

∴ x = \frac{10.8}{sin(57)}

∴ x = 12.87752356

→ Round your answer to the nearest tenth

∴ x = 12.9

Exact form: x = \frac{10.8}{sin(57)}

Rounded to the Nearest Tenth: x = 12.9

3 0
3 years ago
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