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Alecsey [184]
3 years ago
7

Rebecca has 21 math problems to solve. She has solved 2-7 of them. How many problems has she solved?

Mathematics
1 answer:
solniwko [45]3 years ago
6 0
Rebecca has 21 math problems 
 

She has solved none....
2-7=-5 

You cannot solve negative five problems 

Answer: 0


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If 4x+y=h, then x is equal to
lianna [129]
4x + y = h

Rearrange the problem so your equation equals x, not h
y - h = -4x

Divide both sides by -4
-4y - 4h = x

Cheers!
5 0
3 years ago
Michelin Tires would like to estimate the average tire life of its Latitude Tour tire in terms of howmany miles it lasts. Assume
VARVARA [1.3K]

Answer:

6 samples

Step-by-step explanation:

Given :

Sample size, = n

Standard deviation, = 6000

Margin of Error = 2000

Confidence interval, α = 95%

Zcritical at 95% = 1.96

n = (Zcritical * σ) / margin of error

n = (1.96 * 6000) /2000

n = 11760 / 2000

n = 5.88

n = 6 samples

6 0
2 years ago
"Data from the World Health Organization in 2013 were used to predict the life expectancy of men in a country from the life expe
marshall27 [118]

Answer:

The predicted life expectancy of men in a country in which the life expectancy of women is 70 years is 65.33 years.

Step-by-step explanation:

The least square regression line is used to predict the value of the dependent variable from an independent variable.

The general form of a least square regression line is:

\hat y=\alpha +\beta x

Here,

<em>y</em> = dependent variable

<em>x</em> = independent variable

<em>α</em> = intercept

<em>β</em> = slope

The regression line to predict the life expectancy of men in a country from the life expectancy of women in that country is:

\hat y=3.73 +0.88 x

Compute the life expectancy of men in a country in which the life expectancy of women is 70 years as follows:

\hat y=3.73 +0.88 x

  =3.73 +(0.88\times 70)\\=3.73+61.6\\=65.33

Thus, the predicted life expectancy of men in a country in which the life expectancy of women is 70 years is 65.33 years.

6 0
3 years ago
Can someone please help me with this question?
Lena [83]
Answer is 17.7 gallons. Just use 10 gallons x 177%. It's me again, mark as branliest tq
6 0
3 years ago
Read 2 more answers
What is the value of x in the figure below? In this diagram, ABD ~ CAD.
Shalnov [3]

Answer:

The Answer above On The Image

Step-by-step explanation:

thanks……………………………………………

3 0
2 years ago
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