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ZanzabumX [31]
3 years ago
15

How many coefficients are in the expression 1/3y^2 - 18y + 9- 2y^-2

Mathematics
1 answer:
docker41 [41]3 years ago
4 0

There are four coefficients in that expression, so the coefficients are 1/3, -18, 9, and -2.

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A newspaper and three hot chocolates cost $7. Two newspapers and two hot chocolates cost $6. How much does one hot chocolate cos
pochemuha

Answer:

the cost of one hot chocolate is $2.

Step-by-step explanation:

Let x be the hot chocolate cost and y be the newspaper cost.

Given:

A newspaper and three hot chocolates cost $7

So, the equation is

3x+y=7--------(1)

Two newspapers and two hot chocolates cost $6

So, the second equation is.

2x+2y=6---------(2)

Find one hot chocolate cost?

Solve equation 1 for y.

3x+y=7

y=7-3x

Put y value in equation 2

2x+2(7-3x)=6

2x+14-6x=6

14-4x=6

-4x=6-14

-4x=-8

negative sign is cancelled both side.

x=\frac{8}{4}

x=2

Therefore, the cost of one hot chocolate is $2.

3 0
3 years ago
Simplify the expression<br> (1 + 1/x)(1 - 2/x+1)(1 + 2/x-1)
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Answer: 4(×+1) (×-1)

Step-by-step explanation:

3 0
2 years ago
An anchor is released from a boat and begins sinking. Its
Andrew [12]

you multiply -10 and nine and you get -90 hope this helps.

Step-by-step explanation:

6 0
3 years ago
Are rational numbers closed under squaring?
Aleonysh [2.5K]

Answer:

The integers are "closed" under addition, multiplication and subtraction, ... The rational numbers are "closed" under addition, subtraction, and multiplication

Step-by-step explanation:

5 0
3 years ago
Carla purchased a hat for $12, a purse for $26, and a dress for $125. The sales tax rate was 5.6 percent. What was the total amo
disa [49]
12 + 26 + 125 = 163
163 + 0.056(163) = 163 + 9.13 = 172.13
5 0
3 years ago
Read 2 more answers
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