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natka813 [3]
2 years ago
15

Check all that apply

Mathematics
2 answers:
Alinara [238K]2 years ago
7 0

Answer:

Check the 2nd and 3rd answer choices.  See below.

Step-by-step explanation:

Look carefully at the 2nd and 3rd of the given equations.  Note that each of these two can be made identical to 3x + 2y = -12 through multiplication of each by a constant.  Regarding the 2nd answer choice, if we multiply this equation by -1, we obtain 3x + 2y = -12.  Regarding the 3rd answer choice, if we mult. this equation by 5, we get 3x + 2y = -12 again.  

Thus, the 2nd and 3rd answer choice equation have the same solution as does 3x + 2y = -12.

shusha [124]2 years ago
6 0

3x + 2y = -12

equivalent to

-3x - 2y = 12

and

15x + 10y = -60

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A stone is an English measure of weight. There are 14 lb in 1 stone and 2.2 lb in 1 kg.
AveGali [126]
We should use lb to convert weight to kg

let unknown lb be = X
14 lb = 1 stone
X lb = 9 stone
Cross multiply : X × 1 = 9 × 14
X = 126 / 1 = 126 lb

9 stone = 126 lb
let unknown value of kg be = Y
2.2 lb = 1kg
126 lb = Y kg
Cross multiply : 2.2 × Y = 126 × 1
Y = 126 / 2.2 = 57.3 kg

So 9 stone = 126 lb = 57.3 kg

HOPE IT HELPED !!
3 0
3 years ago
Read 2 more answers
On a test with a population mean of 75 and standard deviation equal to 16, if the scores are normally distributed, what percenta
sashaice [31]

Answer:

Percentage of scores that fall between 70 and 80 = 24.34%

Step-by-step explanation:

We are given a test with a population mean of 75 and standard deviation equal to 16.

Let X = Percentage of scores

Since, X ~ N(\mu,\sigma^{2})

The z probability is given by;

           Z = \frac{X-\mu}{\sigma} ~ N(0,1)    where, \mu = 75  and  \sigma = 16

So, P(70 < X < 80) = P(X < 80) - P(X <= 70)

P(X < 80) = P( \frac{X-\mu}{\sigma} < \frac{80-75}{16} ) = P(Z < 0.31) = 0.62172

P(X <= 70) = P( \frac{X-\mu}{\sigma} < \frac{70-75}{16} ) = P(Z < -0.31) = 1 - P(Z <= 0.31)

                                              = 1 - 0.62172 = 0.37828

Therefore, P(70 < X < 80) = 0.62172 - 0.37828 = 0.24344 or 24.34%

6 0
3 years ago
Ming used the calculations shown to find out how much he would spend on 6 pound of ground beef if 10 pounds cost $25.00 what was
ElenaW [278]

Answer:

6 pounds of ground beef cost $15.

Step-by-step explanation:

\frac{6}{10} :\frac{y}{25}

10 × y = 6 × 25

10y = 150

10y ÷ 10 = 150 ÷ 10

y = 15

3 0
2 years ago
EASY QUESTION #2 Ken has read 35 pages of a 120-page book, 53 pages of a 175-page book, and 37 pages of a 155-page book. Part B:
Doss [256]

Answer:

I think it is 125/450=x/100

I'm not sure but i think so, hope this helps!

Step-by-step explanation:

8 0
2 years ago
Q4: Katie and Tyler are working at their lemonade stand. An hour ago, their pitcher of lemonade was 78 full. Since then, they ha
wariber [46]

Answer:

3/8 of the pitcher of lemonade remains.

Step-by-step explanation:

They tell us that at first they had 7/8 of a pitcher full of lemonade, and they ask us to know what fraction is left if they have taken 1/2 of the pitcher of lemonade for a while, which means that it would be a subtraction between what had at the beginning and what they have taken, would be:

7/8 - 1/2 = (14 - 8) / 8 * 2 = 6/16 = 3/8

Which means that 3/8 of the pitcher of lemonade remains.

7 0
3 years ago
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