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3 years ago

13

Whats the variable of 1

1 answer:

Fudgin [204]3 years ago

7 0

Answer:

There are no variables, there is only a 1

Step-by-step explanation:

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One number is 7 more than another. The difference between their squares is 161. What are the numbers?

sergeinik [125]

X is 7 more than y
x>y then
difference betwen squares is 161 so

x=7+y
and
x²-y²=161

so
x=7+y
sub that for x in other equation

(7+y)²-y²=161
y²+14y+49-y²=161
14y+49=161
minus 49 both sides
14y=112
divide both sides by 14
y=8

sub back

x=7+y
x=7+8
x=15

the numbers are 15 and 8

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3 years ago

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6th out of 10 questions

Vlad [161]

The answer is D

To solve the answer you would have needed to multiply the reciprocal of $\frac{2}{7}$ but in this case, Unvi multiplied with the reciprocal of 14.

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3 years ago

Dean Halverson recently read that full-time college students study 20 hours each week. She decides to do a study at her universi

romanna [79]

Answer: The p-value is 0.154.

Step-by-step explanation:

Since we have given that

We claim that

Null hypothesis :

$H_0:\mu=20$

Alternate hypothesis :

$H_1:\mu$

Population mean = 20 hours

Sample mean = 18.5 hours

Sample standard deviation = 4.3 hours

Sample size n = 35

So, test statistic would be

$z=\dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{18.5-20}{\dfrac{4.3}{\sqrt{35}}}\\\\z=\dfrac{-1.5}{0.726}\\\\z=-2.066$

So, the p value would be 0.154.

Hence, the p-value is 0.154.

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3 years ago

The formula f equals c over lambda, where f = frequency, c = wave speed, and λ = wavelength, is used to calculate frequency. Sol

Alexus [3.1K]

Answer:

B. c = fλ

Step-by-step explanation:

The given equation is

$f=\frac{c}{\lambda}$

To solve for c you must multiply both sides of the equation by lambda.

$f=\frac{c}{\lambda}\\f\lambda=\frac{c}{\lambda}*\lambda \\f \lambda=c$

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3 years ago

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Carol's monthly take home pay is $1500.she spends $250.a month on food. What the ratio of food costs to take home dollars

Basile [38]

Answer:

The answer is 6 ratio because when you divide these two number then the anwer is 6

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3 years ago

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