1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kruka [31]
3 years ago
7

Use the expression below to answer the question. 20 + 8y – 9y – 21 Which expression is equivalent? A. 2(10 + 4y – 7y – 19) B. 2(

10 + 4y) – 3(3y – 7) C. 4(5 + 2y – 5y – 17) D. 4(5 + 2y) – 3(3y + 7)
Mathematics
1 answer:
Amanda [17]3 years ago
8 0

Option D: 4(5+2y)-3(3y+7) is the correct answer.

Explanation:

The expression is $20+8 y-9 y-21$

Solving the expression, we have,

-y-1

Now, we need to find an expression equivalent to $20+8 y-9 y-21$

Option A: 2(10+4y-7y-19)

Solving the expression, we have,

$\begin{aligned} 2(10+4 y-7 y-19) &=2(-9-3 y) \\ &=-18 y-6 y \end{aligned}$

From the result, the expression 2(10+4y-7y-19) is not equivalent to $20+8 y-9 y-21$

Option A is not the correct answer.

Option B: $2(10+4 y)-3(3 y-7)$

Solving the expression, we have,

$\begin{aligned} 2(10+4 y)-3(3 y-7) &=20+8 y-9 y+21 \\ &=-y+41 \end{aligned}$

From the result, the expression $2(10+4 y)-3(3 y-7)$ is not equivalent to $20+8 y-9 y-21$

Option B is not the correct answer.

Option C: 4(5+2y-5y-17)

Solving the expression, we have,

$\begin{aligned} 4(5+2 y-5 y-17) &=20+8 y-20 y-68 \\ &=-12 y-48 \end{aligned}$

From the result, the expression 4(5+2y-5y-17) is not equivalent to $20+8 y-9 y-21$

Option C is not the correct answer.

Option D: $4(5+2 y)-3(3 y+7)$

Solving the expression, we have,

$\begin{aligned} 4(5+2 y)-3(3 y+7) &=20+8 y-9 y-21 \\ &=-y-1 \end{aligned}$

From the result, the expression $4(5+2 y)-3(3 y+7)$ is equivalent to $20+8 y-9 y-21$

Option D is not the correct answer.

You might be interested in
D all the time and I like the time you ​
andriy [413]

Answer:

Step-by-step explanation:

1a+1b(a+b-c)+1b+1c(b=c-a)+ 1a+1c(c+a-b)

1a+1b-c+1b +1c-a+1a+1c-b

1a+2b-c+a+1c-b

2a+1b+c this is the answer I think lol

6 0
2 years ago
Solve for the roots in simplest form using the quadratic formula:
Softa [21]

Step-by-step explanation:

4x² - 12x + 17 = 0

i is an imaginary number and it equals √-1, and you usually put it when the number under the root is negative.

So √-5 = √5i and √-4 = 2i

3 0
3 years ago
Lavaughn owns a small business selling ice-cream. He knows that in the last week 56 customers paid cash, 14 customers used a deb
garri49 [273]

Answer:

0.05

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Help please this increases my average mark
Mekhanik [1.2K]

Answer:

He drove 111 miles

If we were given the distance Lan drove last weekend instead off how much gas he used then we would have to find the amount of gas used by lan.

Step-by-step explanation:

Ian's car can go 185 miles on 5 gallons of gas

On 5 gallons of gas lan's car can go 185 miles

Therefore in gallon of gas lan 's car can go

185/5 = 37

So, for 3 gallons of gas lan's car can go

3 × 37 = 111

for 3 gallons of gas lan's car can go 111 miles

If we were given the distance Lan drove last weekend instead off how much gas he used then we would have to find the amount of gas used by lan.

5 0
2 years ago
HELP<br> Find the slope between the two points (6,-3) (7,2)
PtichkaEL [24]

Answer: The slope is 5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Ms. Banerjee bought a car for $22,500. The amount she paid for her new car was twice the amount she paid for her previous car, w
    7·1 answer
  • The point that the two rays intersect is called the
    9·1 answer
  • In a packet of mixed candies there are two fruit centers for every three caramel centers. There are 30 candies in the packet.
    15·2 answers
  • The inequality x + 2y ≥ 3 is satisfied by point (1, 1).<br> True<br> False
    7·2 answers
  • I like CRPs. What about you? Do you want to CRP? I am training CRP's for a bigger wider roleplay. CRP means Combat Roleplay
    12·2 answers
  • Which expression is in simplest form?
    12·1 answer
  • Which of the following are necessary
    11·1 answer
  • Shawn planned to run 4.2 miles every day, but yesterday he only had time to run 0.2 of that distance. How far did Shawn run yest
    6·1 answer
  • Identify the equations as parallel lines, perpendicular lines, or neither.
    12·1 answer
  • Yuto has a bag containing 3 red marbles, 5 blue marbles, 2 green marbles, and 8 yellow marbles. Rin reaches into the
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!