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3 years ago

What is -1/4(x+8)+30=7

Mathematics

1 answer:

umka2103 [35]3 years ago

4 0

Answer: x=84

Step-by-step explanation: Solve for x by simplifying both sides of the equation, then isolating the variable.

I hope this helps you out. :)

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Which value from the set {3,10,90,108} will make the equation 3x + 3 = 33 true ?

Alja [10]

Answer:

$x = 10$ will make the equation true

Step-by-step explanation:

Given

$\{3,10,90,108\}$

$3x +3= 33$

Required

Which is true for x

We have:

$3x +3= 33$

Collect like terms

$3x= 33 - 3$

$3x= 30$

Solve for x

$x = 30/3$

$x = 10$

7 0

3 years ago

Jada walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain

Alik [6]

Answer:

A. Every minute, 2/3 of a gallon is drained, so the rate of change would be -2/3

B. It would take 7.5 minutes to drain the tank

5 0

3 years ago

Read 2 more answers

-5v+6=-12+62 <br> What is v?

sattari [20]

Answer:

-8.8

Step-by-step explanation:

combine terms on right side of equal sign(50)

know your equation is -5v+6=50

subtract 6 from both sides so you know have -5v=44

then divide both sides by negative five so know you have v=-8.8

(plug in -8.8 to check)

4 0

4 years ago

Read 2 more answers

For a random sample of 50 measurements on the breaking strength of cotton threads, the mean breaking strength was found to be 21

Vikentia [17]

Answer:

205.81 to 214.19

Step-by-step explanation:

Sample size (n) = 50

Sample mean weight (X) = 210 grams

Sample standard deviation (s) = 18 grams

Confidence coefficient (Z) at 90% = 1.645

The confidence interval for the true mean breaking strength of cotton threads of this type, at a 90% confidence level, is given by:

$CI=X \pm Z*\frac{s}{\sqrt n}\\CI=210 \pm 1.645*\frac{18}{\sqrt 50}\\CI = 210 \pm 4.19\\CI =205.81\ to\ 214.19$

The confidence interval is 205.81 grams to 214.19 grams.

6 0

4 years ago

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PtichkaEL [24]

It's two. 50% chance of heads, 50% chance of tails.

7 0

3 years ago