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3 years ago

What is the value of the expression 24 – (7 + 5) ÷ 6 + 8? A. 10 B. 14 C. 11 D. 30

1 answer:

6 0

The answer is B 7 plus 5 make 12 divide 12 by 6 which is two after that you add 2 plus 8 which is 10 so subtract 24 minus 10 which is 14

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If the length of each side of an equilateral triangle were increased by 50 percent, what would be the percent increase in the ar

Shkiper50 [21]

Answer:

The area increase by 225%

Step-by-step explanation:

attachment of a triangle

The area of a triangle equilateral is calculated with the next formula:

A= $\frac{a*h}{2}$

$h^{2} +(\frac{a}{2})^{2}$ = $a^{2}$

$h^{2} = a^{2} - \frac{a^{2} }{4}$ = $\frac{a^{2} }{4}$ *3

h= $\sqrt{\frac{a^{2}*3 }{4} }$

h= $\frac{\sqrt{3}*a }{2}$

replacing in the A equation:

A= $\frac{a*\sqrt{3}*a }{2*2}$ 

A= $\frac{\sqrt{3}*a^{2} }{4}$ 

Now each side increse by 50% ⇒ a=1.5a

A= $\frac{\sqrt{3}*(1.5a)^{2} }{4}$ 

A= $\frac{\sqrt{3}*a^{2}* 2.25 }{4}$ 

A=2.25 * $\frac{\sqrt{3}*a^{2} }{4}$ 

It means that the area incrase by 225%

6 0

3 years ago

Which two expressions are

Oxana [17]

Answer:

9(2p-18) and 2(9p-18)

Step-by-step explanation:

6 0

3 years ago

2) At the store Julie bought a shirt for $23.97, which was 25% off the original price. Which of these should she use to find x,

Scrat [10]

Answer:

0.75x = 23.97

Step-by-step explanation:

The total is 23.97. 0.25% is off so you have to subtracting 25% from 100% and you will get 75% if you convert it to decimal you will get 0.75.

5 0

3 years ago

What is the property of an angle?

Elena-2011 [213]

Answer:

When to lines intersect they create four angles. Each angle is opposite to another and form a pair of what are called opposite angles. Angles a and c are opposite angles. Angles b and d are opposite angles. Opposite angles are equal.

3 0

3 years ago

Read 2 more answers

Calcula el volumen de una pirámide de altura 3cm cuya base es un cuadrado de lado 4cm

Masja [62]

AnsweR IS 12

Step-by-step explanation:

4 X 3 IS 12

6 0

3 years ago