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Vikki [24]
3 years ago
5

-3x-7y = 189x+2y = 3​

Mathematics
1 answer:
oee [108]3 years ago
4 0

Answer:

x = -13

y = 3

Step-by-step explanation:

-3x-7y = 18

9x + 2y = 3

__________

3(-3x-7y=18)

9x + 2y = 3

__________

-9x - 21y = 54

9x + 2y = 3

__________

-19y = 57

y = 3

-3x - 7(3) = 18

-3x - 21 = 18

-3x = 39

x = -13

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3 years ago
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2) In August, Emily's Clothing Store sold 460 shirts with the ratio of short sleeve to long
aivan3 [116]

Answer:

138

Step-by-step explanation:

We know that there are at least 3 short sleeved shirts and there are at least 7 long sleeved shirts. And we know it's in that ratio. So the best way to start this is to divide 460 by 7+3 to get the single unit amount of both shirts.

46 is the single unit amount. So 46 * 3 will get us our short sleeved shirts:

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To check our answer, we'll take 460-138 and divide that by 7 to see if we get 46:

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4 0
3 years ago
The table shows data gathered by an environmental agency about the decreasing depth of a lake during the first few months of a d
Elanso [62]
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y = mx + b
slope(m) = -0.6
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now we sub and find b, the y int
346 = -0.6(0) + b
346 = b
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after 4 weeks...
y = -0.6(4) + 346
y = - 2.4 + 346
y = 343.6 <==== after 4 weeks

after 9 weeks..
y = -0.6(9) + 346
y = -5.4 + 346
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4 years ago
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Step-by-step explanation:

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3 years ago
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