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Mademuasel [1]
2 years ago
8

3. Solve the system of equations using linear combination. a + c = 9 8a + 4.5c = 58

Mathematics
2 answers:
sergij07 [2.7K]2 years ago
7 0
A+c=9 so a=9-c
8(9-c)=72-8c+4.5c=58
12.5c=58-72
12.5c=-14
c=-1.12
lana66690 [7]2 years ago
5 0
Hey I have posted a picture the method I use to solve simultaneous equations is change the sign and follow the new sign.
This involves changing the sign for the second equation and solving it

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Solve for x.<br> x^2 + 6 = 10
Ostrovityanka [42]

Steps To Solve:

x² + 6 = 10

~Subtract 6 to both sides

x² + 6 - 6 = 10 - 6

~Simplify

x² = 4

~Take square root of 4

x² = ±√4

~Simplify

x = -2 or x = 2

Best of Luck!

5 0
3 years ago
7.5x10^5-2.9x10^4=? having trouble
alexira [117]
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7 0
2 years ago
Help me I really need to get this done
posledela

Answer:

It’s the second one

Step-by-step explanation:

6 0
2 years ago
What is the solution to the equation
Elis [28]

Answer:

x = -13

Step-by-step explanation:

Distribute:

8 - 6x + 10x - 15 = 20 - 5x

Combine like terms:

4x - 7 = 20 - 5x

Isolate Variable

-x = 13

-1(-x) = -1(13)

x = -13

8 0
3 years ago
Read 2 more answers
in ABC the measure of angle A is 2x+3 the measure of angle B is 4x+2 the measure of angle C is 2x-1 what are the measures of the
Virty [35]


IN A triangle, sum of all angles = 180 degrees

2x + 3 + 4x+2 + 2x -1 = 180

8x +4  = 180

8x = 176

x = 176 /8 = 22 degrees

the angles are A = 2(22)+3 = 44+3 = 47 DEGREES

B = 4(22)+2 = 88 + 2 = 90 DEGREES

C = 2(22) -1 44-1 = 43 DEGREES

7 0
3 years ago
Read 2 more answers
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