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Natali5045456 [20]
3 years ago
5

Solve by factoring:4x² - 8x=0​

Mathematics
1 answer:
AnnyKZ [126]3 years ago
5 0

Answer:

Step-by-step explanation:

4x² - 8x= 0​

4x(x -2) = 0

: 4x = 0 or x - 2 = 0

4x = 0

Dividing by 4

x = 0/4

x = 0

And

x - 2 = 0

x = 2

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runben sees 14 wheels on a total of 6 bicycles and tricycles how many bicycles and tricycles are there
olganol [36]

Answer:

B = 4

T = 2

Step-by-step explanation:

First, figure out the equation.

We know that bicycles have 2 wheels, that there are 3 on a tricycle, and there are a total of 14 wheels and a total of 6 bicycles and tricycles.

Let b stand for bicycles and t stand for tricycles:

14 = 2b + 3t

6 = b + t

We can figure out the amount of either by rearranging the second equation to isolate one variable. I will solve it in two ways

In the first way, I will solve for b

(-t) 6 = b + t (-t)

6 - t = b

Plug this into the first equation and solve for remaining variable

14 = 2(6 - t) +3t

14 = 12 - 2t + 3t

14 = 12 +t

-12   -12

2 = t

6 - 2 = b

b = 4

The second way was to solve for t first

(-b) 6 = b + t (-b)

6 - b = t

14 = 2b + 3(6 - b)

14 = 2b + 18 - 3b

(-18) 14 = 18 -b  (-18)

-4/-1 = -b/-1

b = 4

6 - 4 = t

t = 2

It doesn't matter which way you go, they both give you the exact same answer.

Sooo, recap!

1) write equations

2) switch the easier of the two to isolate one variable

3) substitute to find other variable  (x2)

4) Find answers! =D

Hope this helps!

8 0
2 years ago
The rectangular floor of a classroom is 20 feet in length and 36 feet in width. A scale
vova2212 [387]

Answer:

56

Step-by-step explanation:

20 feet =10 inchs

10 feet is 5 inches

5 feet is 2.5 inches

1 feet is 0.5 inch

10+5+2.5+0.5= 18 inches

10+10+18+18=56

5 0
2 years ago
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How do i find the absolute value for l6ml=42
DIA [1.3K]

Answer:

m = 7

m = -7

Step-by-step explanation:

7 0
3 years ago
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What is the value of x in the equation 6 = -3(x + 2)?
Sphinxa [80]

Answer:

x=-4

Step-by-step explanation:

Dividing both sides by -3, you get x+2=-2. So x=-4.

4 0
3 years ago
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The price of an item yesterday was $140. Today, the price fell to $119. Find the percentage decrease.
34kurt

Answer:

-15%

Step-by-step explanation:

4 0
3 years ago
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