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kari74 [83]
4 years ago
8

Which equation shows the substitution method being used to solv the system of equations?

Mathematics
1 answer:
slava [35]4 years ago
8 0
The x value in the second equation (y+2) is substituted for the x in the first equation in...

Answer A.
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Determine the number of pounds of nuts selling for $6 per pound and raisins selling for $3 per pound
Luda [366]
For the mix you need 60 Ib of nuts and raisins, and 60 lb of mix will sell for $300.
Let <em>x</em> be the weight of nuts and <em>y</em> the weight of raisins needed for the mix.
Total weight = <em>x</em>+<em>y</em> = 60, so <em>y</em> = 60 - <em>x</em>
Total value = 6<em>x</em> + 3<em>y</em> = 300.  From the above, we can substitute the <em>y</em> for 60 - x:
Total value = 6<em>x</em> + 3(60 - <em>x</em>) = 300, which we can simplify to:
6<em>x</em> + 180 - 3<em>x</em> = 300, and simplify again to:
3<em>x</em> = 120, and again to:
<em>x</em> = 40.  We can now calculate<em> y</em> from the first equation y = 60 - <em>x</em>, so:
y = 20.
40 lb of nuts and 20 lb of raisins.  Check:
40 lb x $6/lb = $240, and 20 lb x $3/lb = $60, $240 + $60 = $300.



7 0
3 years ago
A rental car company charges $42.72 per day to rent a car and $0.10 for every mile driven. Zoey wants to rent a car, knowing tha
Colt1911 [192]

Answer:

7 Days

Step-by-step explanation:

Miles cost:

$0.10 * 200 = $20


Daily Cost

Her budget at this point is $330 because $350 - $20 (the miles)

$330 / 42.72  = Roughly 7.72

Therefore Zoey can drive for 7 days before her budget runs out.

6 0
3 years ago
HELP HELP PLEASE the height of the triangle is 16 cm, and fe=10 cm. What is the area of the triangle? A. 50 CM^2 B. 80 CM^2 C.16
enyata [817]

Answer:

B. 80 cm^2

Step-by-step explanation:

A = bh/2

A = (FE)(16 cm)/2

A = (10 cm)(16 cm)/2

A = 80 cm^2

4 0
3 years ago
What is 9/10 + 7/100?
svet-max [94.6K]

9/10 + 7/100

find the common denominator for 9/10 which is 100

multiply by 10 for 9/10

(9)(10)=90

(10)(10)=100

90/100+7/100

Answer:

97/100

8 0
3 years ago
Read 2 more answers
A factory produces 9236 computers and four times as many keyboards how many keyboards does the factory produce?
kicyunya [14]

Answer:

9236 x 4 = 36944

36944 keyboards are produced by the factory.

Step-by-step explanation:

7 0
3 years ago
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