All categories

2 years ago

Use the properties of real numbers to help simplify each expression mentally (19+5)+5

Mathematics

1 answer:

Lera25 [3.4K]2 years ago

3 0

Answer:

Step-by-step explanation:

19+(5+5)=19+10=29

You might be interested in

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

What times itself equals -10

lutik1710 [3]

0x 10 = -10
I think

7 0

2 years ago

If a and b are whole number, what is the distance between the two points? Show your work.

Gnoma [55]

Answer:

Step-by-step explanation:

|-b| = b

b+5b= 6b

4 0

2 years ago

15+(12+8a) simplify and justify each step

ki77a [65]

1. distribute a 1 to the 12 and 8a
2. you'll get 15+ 12 +8a
3. add the like terms(15 and 12)
4. your final answer will be 27+8a

5 0

2 years ago

Read 2 more answers

Translate to an algebraic expression.

beks73 [17]

The answer is d=63/z

6 0

3 years ago