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4 years ago

1/3(9x-15)=4x Please help me

Mathematics

1 answer:

aivan3 [116]4 years ago

6 0

Answer:

Step-by-step explanation:

1/3(9x-15)=4x

Multiply each term by 3

9x - 15 = 3(4x)

9x - 15 = 12x

12x - 9x = -15

3x = -15

x = -15/3

x = -5

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4 over 5x minus 8 equals 3. what is x

ehidna [41]

4/5x-8=3
move -8 to the other side and add
4/5x=3+8
4/5x=11
move 5x to the other side and multiply
4=5x*11
4=55x
4/55=x

8 0

2 years ago

A normal distribution has a mean 20 and standard deviation 5. What is the z score that corresponds to the value x=222

sashaice [31]

Answer: The z score that corresponds to the value x=22 is 0.4 .

Step-by-step explanation:

Given : A normal distribution has a mean 20 and standard deviation 5.

i.e. $\mu=20$

$\sigma=5$

Let x be the random selected variable.

We know that to find the z-score corresponds to the value x is given by :-

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

For x = 22, we have

$z=\dfrac{22-20}{5}=\dfrac{2}{5}\\\\\Rightarrow\ z=0.4$

Hence, the z score that corresponds to the value x=22 is 0.4

5 0

3 years ago

3x+10=4x+10 what is the answer?

ValentinkaMS [17]

Answer:

x is 0.

Step-by-step explanation:

Subtract both sides by 3x. Then, you will have 10= x+10. Subtract 10 on both sides to isolate x, then you will have x=0. Therefore, this equation on both sides has a solution of 0. Hope this helps!

4 0

3 years ago

Read 2 more answers

7÷849<br><img src="https://tex.z-dn.net/?f=7%20%5Cdiv%20849%20%3D%20" id="TexFormula1" title="7 \div 849 = " alt="7 \div 849 = "

AnnZ [28]

.00824499 is the answer if you just needed to divide them.

4 0

3 years ago

Read 2 more answers

Ellie's favorite recipe requires 3 eggs and makes 6 servings. Grace modifies the recipe by using 7 eggs and increasing all other

grandymaker [24]

The modified recipe will make 14 servings.

Step-by-step explanation:

Given,

Eggs used = 3

Servings made = 6

Ratio of eggs to servings = 3:6

Eggs used in modified recipes = 7

Let,

x be the number of servings = x

Ratio of eggs to servings = 7:x

Using proportion;

Eggs to servings :: Eggs to servings

3:6::7:x

Product of mean = Product of extreme

$6*7=3*x\\42=3x\\3x=42$

Dividing both sides by 3

$\frac{3x}{3}=\frac{42}{3}\\x=14$

The modified recipe will make 14 servings.

Keywords: ratio, proportion

Learn more about proportion at:

#LearnwithBrainly

8 0

3 years ago