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Assoli18 [71]
3 years ago
5

X=y-8 7x+2y=16 what is the answer???

Mathematics
1 answer:
-Dominant- [34]3 years ago
5 0

Answer:

x = 0 , y = 8

Step-by-step explanation:

x = y - 8 -----(1)

7x + 2y = 16 --------(2)

Substitute (1) in (2)

7(y - 8) + 2y = 16

7y - 56 + 2y = 16

9y = 72

y = 8

Substitute y in (1)

x = 8 - 8 = 0

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Answer:

The amount of nuts is 16 kg and cereal mixture is 44 kg to obtain 60 kg of a mix that will sell for $1.40 per kg

Step-by-step explanation:

Let

x=nuts at $2.50 per kg

y=cereal at $1 per kg

x+y=60 kg (1)

2.50x+y=1.40(60) (2)

From (1)

x=60-y

Substitute x=60-y into (2)

2.50x+y=1.40(60)

2.50(60-y)+y=84

150-2.5y+y=84

-1.5y=84-150

-1.5y=-66

Divide both sides by -1.5

y=44 kg

Substitute y=44 into (1)

x+y=60

x+44=60

x=60-44

=16

x=16 kg

3 0
3 years ago
Find the value of x<br> I give you 10 points if you help
mestny [16]

Step-by-step explanation:

x = 55

I hope this is helpful

4 0
3 years ago
Which of the following statements is INCORRECT?<br><br> please help me this assignment is overdue
kumpel [21]

Answer:

B. DE = 58

Step-by-step explanation:

The base angles (<F and <E) of the ∆DEF are congruent/equal. This means that ∆DEF is an isosceles triangle.

This implies that, the two sides (DF and DE) that are opposite to the base angles are congruent/equal.

DE = 40 (given) => option B is INCORRECT

Therefore:

8x - 24 = 40

Solve for x

8x - 24 + 24 = 40 + 24

8x = 64

8x/8 = 64/8

x = 8 (option C is CORRECT)

Let's find DF and FE:

DF = 8x - 24

Plug in the value of x

DF = 8(8) - 24

DF = 64 - 24

DF = 40 (Option D is CORRECT)

FE = 6x + 10

FE = 6(8) + 10

FE = 48 + 10

FE = 58 (Option A is CORRECT)

The only incorrect statement is:

B. DE = 58

7 0
3 years ago
Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.
Readme [11.4K]

Answer:

16 cm shorter, 149 cm

Step-by-step explanation:

8 0
3 years ago
Simplify the expression 7y+2x-10y +3x2 -10x
vovikov84 [41]

Answer:

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Step-by-step explanation:

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3 years ago
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