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3 years ago

Solve the equation for x 3x + 20 = x - 8

Mathematics

2 answers:

lesantik [10]3 years ago

4 0

Answer:

x=−14

Step-by-step explanation:

Step 1: Subtract x from both sides.

3x+20−x=x−8−x

2x+20=−8

Step 2: Subtract 20 from both sides.

2x+20−20=−8−20

2x=−28

Step 3: Divide both sides by 2.

−28

x=−14

spin [16.1K]3 years ago

4 0

Answer:

x = 9.33333333333

Step-by-step explanation:

How to solve...

3x + 20 = x - 8

+ 8 = x + 8

---------------------- ( add 8 on both sides )

3x + 28 = x

3x + 28 = 3x

---------------------- ( divide 3x on both sides )

28 = 3x

3 = x

---------------------- ( divide 28 by 3 )

x = 9.33333333333

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3 years ago

At a ski resort, 1/4 of the 300 skiers are beginners, and 1/4 of the 260 snowboarders are beginners. The resort staff used the d

Evgen [1.6K]

$\frac{1}{4}(300 + 260) = \frac{1}{4} \times 300 + \frac{1}{4} \times 260$ is the expression that demonstrates the distributive property

Solution:

Given that,

At a ski resort, $\frac{1}{4}$ of the 300 skiers are beginners

$\frac{1}{4}$ of the 260 snowboarders are beginners

The resort staff used the distributive property to make the calculation of the total number of beginners on the ski slopes

Beginners in skiers = $\frac{1}{4}$ of the 300

Beginners in snowboarders = $\frac{1}{4}$ of the 260

Total number of beginners = Beginners in skiers + Beginners in snowboarders

$\text{ Total number of beginners } = \frac{1}{4}(300) + \frac{1}{4}(260)$

We have to use distributive property

The distributive property of multiplication states that when a number is multiplied by the sum of two numbers, the first number can be distributed to both of those numbers and multiplied by each of them separately, then adding the two products together for the same result as multiplying the first number by the sum

Therefore, our expression is:

$\frac{1}{4}(300) + \frac{1}{4}(260)$

We have to take $\frac{1}{4}$ as common term to get distributive property

$\frac{1}{4}(300) + \frac{1}{4}(260) = \frac{1}{4}(300 + 260)\\\\\frac{1}{4} \times 300 + \frac{1}{4} \times 260 = \frac{1}{4}(300 + 260)$

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8 0

3 years ago

How would you graph 4x-7y=28 ?

andrezito [222]

Answer:

y = 4/7x - 4

Step-by-step explanation:

You first have to put it in y = mx + b form

So, we first subtract 4x from both sides: -7y = -4x + 28

Divide both sides by -7

y = 4/7x - 4

Now to graph you have to start at the starting point which is -4

So we start with our point on -4 then move up 4 times and 7 times to the left. Mark the points then draw your line!

7 0

3 years ago

Read 2 more answers