All categories

4 years ago

PLEASE I NEED HELP ASAP ITS DUE TOMORROW PLEAAASEE HELP ME 30 POINTS AND BRAINIEST!!!

Mathematics

1 answer:

Hunter-Best [27]4 years ago

6 0

Step-by-step explanation:

Work: (A)

a) 20−4x=12−x+8−3x

20−4x=12−x+8−3x

20+−4x=12+−x+8+−3x

−4x+20=(−x+−3x)+(12+8)

−4x+20=−4x+20

−4x+20+4x=−4x+20+4x

20=20

20−20=20−20

0=0

In this equation... All real #s are solutions.

Work: (B)

b) 5x+4x−3=24+8x

5x+4x−3=24+8x

5x+4x+−3=24+8x

(5x+4x)+(−3)=8x+24

9x+−3=8x+24

9x−3=8x+24

9x−3−8x=8x+24−8x

x−3=24

x−3+3=24+3

x=27

Work: (C)

c) 5x+6=2x+6+3x−15

5x+6=2x+6+3x−15

5x+6=2x+6+3x+−15

5x+6=(2x+3x)+(6+−15)

5x+6=5x+−9

5x+6=5x−9

5x+6−5x=5x−9−5x

6=−9

6−6=−9−6

0=−15

HOPE THIS HELPS <3 :D

You might be interested in

Which expression is equivalent to 2 - 35?

Shalnov [3]

Answer:

2+(-35)

Minus and a plus make a minus

2-35

8 0

3 years ago

Read 2 more answers

Suppose that prices of a certain model of new homes are normally distributed with a mean of $150,000. Use the 68-95-99.7 rule to

konstantin123 [22]

Answer:

C. 47.5%

Step-by-step explanation:

The summary of the given statistics include:

mean =150000

standard deviation: 1200

The objective is to use tributed with a mean of $150,000. Use the 68-95-99.7 rule to find the percentage of buyers who paid: between $150,000 and $152,400

The z score formula can be use to calculate the percentage of the buyer who paid.

$z = \dfrac{X - \mu}{\sigma}$

For the sample mean x = 150000

$z = \dfrac{150000 - 150000}{1200}$

$z = \dfrac{0}{1200}$

z = 0

For the sample mean x = 152400

$z = \dfrac{152400 - 150000}{1200}$

$z = \dfrac{2400 }{1200}$

z = 2

From the standard normal distribution tables

P(150000 < X < 152400) = P(0 < z < 2 )

P(150000 < X < 152400) =P(z<2) -P(z<0)

P(150000 < X < 152400) =0.9772 -0.5

P(150000 < X < 152400) = 0.4772

P(150000 < X < 152400) = 47.7% which is close to 47.5% therefore option C is correct

3 0

3 years ago

The theoretical probability of spinning an even number on a spinner is 2/3 . The spinner has 8 even-numbered sections. How many

sveta [45]

There are 12 sections

here is how to do it:

2 8
_ = _
3 x
so you cross multiply

8 x 3 = 2x
24=2x
12=x

4 0

3 years ago

Read 2 more answers

Solve the inequality.<br> 9(x - 5) >-9<br> The solution is

Drupady [299]

What does x equal ??

8 0

3 years ago

Ryan bought a total of 40 juice boxes. He bought 8 more boxes of apple juice than of grape juice. How many of each kind did he b

postnew [5]

we take away the extra 8 boxes of apple juice first:

40 - 8 = 32

Now that we have equal number of apple juice and graph juice, we divide them into 2:

32 ÷ 2 = 16

There are 16 boxes of graph juice.

We add back the 8 boxes of apple juice we took away just now

16 + 8 =24

There are 24 boxes of apple juice.

Answer: 24 boxes of apple juice and 16 boxes of graph juice.

3 0

3 years ago