All categories

3 years ago

8. Somebody said the answer is letter A. I Don't Know the answer

Mathematics

1 answer:

zloy xaker [14]3 years ago

5 0

Answer:

D. Addition Property of Equality; Subtraction Property of Equality

Step-by-step explanation:

Answer:

Option C and B

Step-by-step explanation:

In the question step C is 23 + 11 = -11 +(-4x) + 11

which is in the form of a + b = c + a

In step C we have added 11 on both the sides to eliminate 11 from right side of the equation.

property which signifies this step is

Addition property of equality :

In step 'f' expression is

\frac{34}{-4}=\frac{-4x}{-4}

In this step equation has been divided by -4 on both the sides to eliminate 4 from the numerator.

In this step division property of equality has been applied.

Therefore Option C and B are the correct options.

You might be interested in

The temperature rises 10 degrees by noon and then falls 10 degrees by 3pm. Is this an example opposites?

Lunna [17]

Answer:

஧ா

Step-by-step explanation:

஧ா஧ா஧ா஧ா஧ா஧ா஧ா஧ா஧ா஧ா஧ா஧ா஧ா஧ா஧ா

6 0

3 years ago

The marked price of an article is 30% above it's selling price and the cost price is 35%less than it's marked price. find the di

SashulF [63]

Answer:

Let C be the cost price of the article. Then:

C(1+30%)=marked price

So:

C(1+30%)=C(1.3)

=1.3C

If the article is then marked down 35%, then its’ price would be:

1.3C(1–35%)=1.3C(.65)

=0.845 or 84.5% of its’ cost

Then:

0.845–1=-0.155

or, a 15.5% loss on the item

8 0

3 years ago

Find the value of the combination. 5C5 A:1 B:5 C:0

Olenka [21]

Answer:

A:1

Step by step explanations:

C(n,r)=C(5,5)

n=5

r=5

=n! / (r!(n-r)!)

=5! / (5!(5-5)!)

6 0

3 years ago

When n basketball uniforms are purchased, the cost, C, of each uniform is given by the equation.

balandron [24]

Answer:

D. Subtraction property of equality; n = 15

Step-by-step explanation:

Given equation that shows the cost of n basketballs uniforms,

C = 40n + 260

According to the question,

Total cost = $ 860,

⇒ 40n + 260 = 860

Using subtraction property of equality, subtract 260 on both sides,

⇒ 40n = 860 - 260

⇒ 40n = 600

Using division property of equality, divide both sides by 40.

⇒ n = $\frac{600}{40}$ = 15.

Hence, 15 uniforms were purchased.

i.e. Option D is correct.

5 0

3 years ago

mr franks economy car can travel 420 miles on a 12 gallon tank of gas. determine how many miles he can travel on 8 gallons

S_A_V [24]

Answer:

280 miles

Step-by-step explanation:

Divide 420 by 12 to find the unit rate of miles per gallon.

You get 35 miles per gallon

To find how many miles he can travel for 8 gallons, multiply 35 by 8.

You get 280 miles.

3 0

3 years ago