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3 years ago

Which expresion is equivalent to 30(1/2x-2)+40(3/4y-4)

Mathematics

1 answer:

Dafna11 [192]3 years ago

6 0

Answer:

15x +30y -220

steps:

30(1/2x-2)+40(3/4y-4)

= 15x-60 +30y-160

= 15x +30y -220

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Given polynomials p, q, r, and s . q≠0 ,s≠0 and r≠0

kkurt [141]

Answer:

$\frac{p}{q} \div \frac{r}{s} = \frac{ps}{qr}$

Step-by-step explanation:

Given

$\frac{p}{q} \div \frac{r}{s} =$

Required

Solve

$\frac{p}{q} \div \frac{r}{s} =$

Turn division to multiplication

$\frac{p}{q} \div \frac{r}{s} = \frac{p}{q} * \frac{s}{r}$

$\frac{p}{q} \div \frac{r}{s} = \frac{ps}{qr}$

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3 years ago

Graph y>1−3x .<br><br> Please help

adoni [48]

Answer:

the answer would be letter B

Step-by-step explanation:

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3 years ago

Read 2 more answers

PLEASE HELP ASAP! WILL GIVE BRAINLIEST! I don’t really understand how to do this?

galben [10]

so we're trying to figure what portion of silas' slime is detergent. we know that his slime is a combo of 5 oz glue and 2 oz detergent for a total of 7 oz of slime.

what we want to find is how much of those 7 oz of slime is detergent.

quite simply 2 oz of the 7 is detergent.

to make that into a percent just divide 2 by 7.

2/7 = 0.2857

then move the decimal over two spots to get

28.57 or

D. 28.6%

just remember that percents are just how much makes up the whole.

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3 years ago

88+88+88+88+88+88+88+88 times 88=_________

Nastasia [14]

Answer:

It's your friend at school. 8360 is your answer.

Step-by-step explanation:

88 + 88

= 176 + 88

= 264 + 88

= 352 + 88

= 440 + 88

= 528 + 88

= 616 + 88 =

704 x 88

= 8360

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3 years ago

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PLS HELP ME QUICK BRAINLIEST +15 POINTS!!!!!

Ipatiy [6.2K]

Answer:

3/4

Step-by-step explanation:

The mean of a data set is synonymous with the average. To find the mean, add up all the values in the data set and then divide by the number of elements.

From the table, there is 12 values. Thus, add up all the 12 values and then divide by 12:

$\bar x=\frac{(-3)+4+8+(-1)+(-4)+(-2)+0+2+5+2+(-3)+1}{12}$

Simplify:

$\bar x=\frac{9}{12}$

Reduce:

$\bar x=3/4$

Therefore, the mean of the data set is 3/4.

For the data set, this means that the average person guesses the temperature too high by about 3/4°F.

(Note: the symbol of x with a bar over it denotes the mean of a set)

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3 years ago