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Eduardwww [97]
3 years ago
6

Use substitution to solve the system. X= ? Y= ? 5x+4y = -10 x = 3y+17

Mathematics
1 answer:
nikklg [1K]3 years ago
4 0

Answer:

x=3.4

y=-6.75

Step-by-step explanation:

5x+4y=-10  (equation 1 )

-5x+3y=-17  (equation 2)

7y=-27

y=-6.75

substitution (equation 1 ) y=-6.75

5x-27=-10

5x=17

x=3.4

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Alonzo invested his savings in two investment funds. The amount he invested in Fund A was $2000 less than the amount he invested
alina1380 [7]

Answer:

There were $13,200 in Fund B.

Step-by-step explanation:

We are given the following in the question:

Let x be the amount in Fund A and y be the amount in Fund B.

The amount he invested in Fund A was 2000$ less than the amount he invested in Fund B.

Thus, we can write the equation:

x = y -2000

Profit percent on Fund A = 7%

Profit percent on Fund B = 8%

Total profit = $1960

Thus, we can write the equation:

7\%(x) + 8\%(y) = 1960\\7x + 8y = 196000

Solving the two equations by substitution, we get,

7(y-2000) + 8y = 196000\\\Rightarrow 15y = 198000\\\Rightarrow y = 13200\\\Rightarrow x = 11200

Thus, there were $13,200 in Fund B.

4 0
3 years ago
I probably should've learned this but can someone help me I'm desperate!
lesantik [10]
Sorry I don't have enough time to deal with this problems, I believe that by using this formula you will easily come out with your answer. In the first one that has all sides you must use the law of cosines. Here is the formulas . Keep it because it is very helpful

6 0
4 years ago
Find the difference or type<br> "impossible"
eduard

Answer:

hope you can understand

6 0
2 years ago
What is<br> 51=3x<br> Please help me
damaskus [11]

Answer:

17 = x

Step-by-step explanation:

51 = 3x

~Divide 3 to both sides

17 = x

Best of Luck!

3 0
3 years ago
Read 2 more answers
N-2=10n+4 over 2 what is the value of n
Snowcat [4.5K]

Consider the given equation:

n-2 = \frac{10n+4}{2}

Cross multiplying in the given equation, we get

(n-2) \times 2 = 10n+4

Applying distributive property which states a(b+c) = ab+ac, we get

(n \times 2) - (2 \times 2) = 10n+4

2n -4 = 10n+4

Adding '4' on both the sides, we get

2n-4+4 = 10n+4+4

2n = 10n+8

Subtracting '10n' from both the sides of the equation, we get

2n-10n = 10n+8-10n

-8n = 8

Dividing by '-8' in both the sides of the equation, we get

n= -1

Therefore, the value of 'n' is -1.

6 0
3 years ago
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