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2 years ago

9

For the following system, if you isolated x in the first equation to use the substitution method, what expression would you subs

titute into the second equation?
−x + 2y = −6
3x + y = 8

−2y + 6

2y − 6

2y + 6

−2y − 6

1 answer:

Musya8 [376]2 years ago

5 0

Answer:

x = 2y + 6

Step-by-step explanation:

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fred has $28 to buy sketch paper for his art class. Each sketch pad costs $9. how many sketch pads can he buy?do not include uni

Tanzania [10]

Answer:

3

Step-by-step explanation:

9/3=3.11111111 round it and you get 3

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3 years ago

A rectangular floor of area 21.6 m2 is going to be tiled. Each tile is rectangular, and has an area of 576 cm2. An exact number

saveliy_v [14]

Answer:

Area of floor = 21.6m2

area of tile = 576cm2=0.0576m2

now,

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3 years ago

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Joe spend $350 on bills monthly. Of this total and 11% for car insurance, 2/9 is for cable, 1/10 is for phone. How much money do

Mice21 [21]

11% = 11/100
2/9 + 11/100 + 1/10 = 389/900
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350 - 151.3 = 198.7

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2 years ago

The number of hours per week that the television is turned on is determined for each family in a sample. The mean of the data is

katovenus [111]

Answer:

$200\ families$

Step-by-step explanation:

Already, we are given 12% of our sample size as 24.

To find the sample size, we equate to find 100%.

Let sample size be denoted by $t$

$If\ 12\%=24\\100\%=t\\t=\frac{100\%\times24}{12\%}\\=200$

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2 years ago

M is directly proportional to r2 <br> When r=2, m=14<br> Work out the value of m when r=12

Genrish500 [490]

we have M is durectly porpotional to r^2

so M=(k)r^2

and when r=2, m=14

so 14=(k)(2)^2

k=14/4 =7/2

so when r=12

m= (7/2)(12)^2 =(7/2)(144) = 504

8 0

3 years ago