MATHEMATICS HIGH SCHOOL

Solve the following system of equations by graphing and select the correct answer below:2x + 6y = 20
3x _ 2y = 8

Answers:
x = 4, y = 2
x = 4, y = _2
x = _2, y = 4
x = 2, y = 4

Answers

Answer 1

Answer: the only answer is x = 4, y = 2,
2(4) + 6(2) = 20
3(4) _ 2(2) = 8
the graph is so easy, please try!!

Answer 2

Answer:

Answer:

Option A is correct.

x =4 , y = 2

Explanation:

Given the system of equation:

$2x+6y = 20$ ......[1]

$3x-2y = 8$ .....[2]

Multiply equation [2] by 3 both sides we get;

$3 \cdot (3x-2y) = 3 \cdot 8$

Using distributive property: $a\cdot (b+c) = a\cdot b+ a\cdot c$

$9x - 6y = 24$ .....[3]

Add equation [1] and [3], to get eliminate y we get;

$2x+6y+9x-6y= 20+24$

Combine like terms we have;

$11x = 44$

Divide both sides by 11 we get;

$x = 4$

Substitute the value of x =4 in [1] we get;

2(4) + 6y = 20

8 + 6y = 20

Subtract 8 from both sides we have;

6y = 12

Divide both sides by 6 we have;

y = 2

Therefore, the values of x and y are; 4 and 2.

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What number must be added to 36 to obtain −12

Answers

The correct answer is -48

36 + x = -12
X = -12 - 36
x = -48

36 + (-48) = -12
36 - 48 = -12

Each participant in a certain study was assigned a sequence of 3 different letters from the set {a, b, c, d, e, f, g, h}. if no sequence was assigned to more than one participant and if 36 of the possible sequences were not assigned, what was the number of participants in the study? (note, for example, that the sequence a, b, c is different from the sequence c, b,a.) 20

Answers

Number of possible sequence of 3 in 8 = 8P3 = 8! / (8-3)! = 336
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Round 0.5809 to the nearest hundred

Answers

The answer to the rounded number of 0.5809 is: 0.58

Which of the following demonstrates the commutative property across multiplication for 2× 10 × 7A. 10 ×7 × 2
B. 2 × (10 × 7)
C. (2 × 10) × 7
D. 2 + 10 × 7

Answers

Its A. Kelp dont you dare.

Hey there, commutative property is when you mix up the numbers but you will still the same answer. 2*10*7=140. 10*7*2=140. Therefore, the answer would be A. 10*7*2

Evaluate the function f(x) = –2x2 – 3x + 5 for the input value –3.