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3 years ago

What would the phrase “three times the sum of a number and 4” look like as variable expression?

Mathematics

1 answer:

IgorC [24]3 years ago

4 0

3(x+4)

Three times -> 3()

the sum of a number and four x+4

3(x+4)

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HELP ME PLSSS IM STUCK

Naddika [18.5K]

Answer:

-67

Step-by-step explanation:

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3 years ago

Use the rule provided to generate the first five terms of the sequence. The rule is 4n + 5.

lesya692 [45]

Answer:

9, 13, 17, 21,25

Step-by-step explanation:

n=1, 4×1+5=9

n=2, 4×2 +5=13

n=5, 4×5 + 5= 25

4 0

3 years ago

Liz wants to estimate the percentage of people who rent their home. She surveys 320 individuals and finds that 176 rent their ho

SOVA2 [1]

Answer: 0.065

Step-by-step explanation:

Given : Sample size : n= 320

The sample proportion of people who rent their home : $p=\dfrac{176}{320}=0.55$

Significance level : $\alpha:1-0.98=0.02$

Then , Critical value : $z_{\alpha/2}=2.33$

The formula to find the margin of error : -

$E=z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\\Rightarrow\ E=(2.33)\sqrt{\dfrac{0.55(1-0.55)}{320}}\\\\\Rightarrow\ E=0.064799034281\approx0.065$

Hence, the margin of error for the confidence interval for the population proportion with a 98% confidence level =0.065

4 0

3 years ago

Kevin picked 3/4 of a pound of strawberries. That afternoon, his sister ate 2/3 of the strawberries Kevin picked. How many pound

Lunna [17]

Answer:

1/12 pounds of strawbebbies left.

Step-by-step explanation:

5 0

3 years ago

The price of a computer component is decreasing at a rate of 15% per year.

Alex_Xolod [135]

Answer:

exponential
$30.71

Step-by-step explanation:

Usually, this wording means the decrease is proportional to the current price, characteristic of an exponential function.

The decay factor is 1-(decay rate), so is 1-0.15 = 0.85. After 3 years, the value has been multiplied by this factor 3 times:

$50×0.85³ ≈ $30.71 . . . . cost in 3 years

_____

Comment on percent per year

Less often, the indicated decrease is intended to be that percentage of the original price. The result is that the price decreases by a constant amount each year, a linear decrease. This condition most often arises in conjunction with figuring depreciation in value for tax or accounting purposes.

The upshot is that you always need to be careful to understand what the base of a percentage is intended to be.

5 0

3 years ago