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fiasKO [112]
2 years ago
9

Solve the following system of equations algebraically: Y = x^2 + 8x – 9 Y = 2x + 7

Mathematics
1 answer:
julia-pushkina [17]2 years ago
3 0
Use simultaneous equations:
2x + 7 = x^2 + 8x - 9
7 = x^2 + 6x - 9
16 = x^2 + 6x
+ or - 4 = 7x
answer is
-4/7 or 4/7
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Solve a=2b-c for b<br><br> Can someone help me
Sauron [17]

Answer:

b=\frac{a}{2} +\frac{c}{2}

Explanation:

While solving literal equations could be quite overwelhming, simply solve it by using normal equation solving methods.

For example, if you were to solve 2x + 3 = 9

You would add 3 on both sides and divide both sides by 2 to determine x.

Do the same thing for literal equations, and if in doubts, plug in numbers to check your work.

Step-by-step explanation:

For this problem, add c on both sides, we do this because we are aiming to eliminate the c from both sides.

a+c =2b

In order to find the value of b, divide both sides by 2, we do this because we want to get rid of the coefficient.

This should leave you with the answer of b=a/2 + c/2

3 0
3 years ago
WILL MARK BRAINLIEST
nordsb [41]
For# 1 the answer would be
-3/5

for #2 the answer would be
3/4

i hope this helps :)
7 0
3 years ago
Could you pleaseee help me
vladimir1956 [14]
3.6 \times 10^{14} \times 8 \times 10^{10}

= 3.6 \times 8 \times 10^{14 + 10}

= 28.8  \times 10^{24}

= 2.88  \times 10^{25}

3 0
3 years ago
Factor 1/3 out of 1/3x−50/3
wlad13 [49]

Answer:

50 1/3

Step-by-step explanation:

3 0
3 years ago
The ratio of dogs to cats in a park is 10 to 9. If there are 50 dogs then how many cats are there
serious [3.7K]
Knowing the ratio for dogs to cats is 10:9

To get to 50 dogs they multiplied 10x5

So multiply 9x5 as well to get the number of cats

Cats = 45

:) hope this helps
6 0
3 years ago
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