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telo118 [61]
3 years ago
11

A) 4x + 5y = 13

Mathematics
1 answer:
Andre45 [30]3 years ago
4 0

Answer:

C) 20x + 25y = 65

−20x + 16y = 64

Explanation:

These two systems are relatively proportionate to each other because the bottom equation was multiplied by −2, while the top equation was multiplied by 5 in order to get two <em>additive-inverse</em><em> </em>coefficients to eliminate with their variables, which in this case are −20x and 20x. Additive inverses result in zero.

I am joyous to assist you anytime.

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A Rectangular Room has a length of 3 more than its width. The perimeter of the room is 90. What is the width of the room?
nignag [31]
The answer to your question is 21
4 0
3 years ago
What is 2 1/6 - 3 4/9?
vodomira [7]
To solve the question, first factorize both fraction,which makes:

2 1/6 - 3 4/9
= 2/6 - 12/9
= 1/3-4/3
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Hope ot helps!
8 0
3 years ago
1. In a game, if you roll a 6 on a 6-sided number cube, you lose a turn. (a) What is the probability that you roll a 6? Explain
ipn [44]

Try this options:

a. total - 6 digits, '6' - 1 digit, then probability of rolling a '6' is 1/6;

b. total - 6 digits, '6' - 1 digit, then probability of rolling 1,2,3,4,5 is 5/6;

c. if probability of rolling a '6' is p and not rolling a '6' is q, then p+q=1;

d. if expected probability of one rolling a '6' is 1/6, then numbers of times of rolling a '6' during 120 times is 120/6=20 times.

5 0
3 years ago
Hi May I know how to solve this question with step by step explanation please
Anuta_ua [19.1K]

Answer:

a = 1, b = - 2

Step-by-step explanation:

The points that lie on the curve and straight line satisfy the corresponding equations.

Substitute the points into their corresponding equations, that is

(1, - 1 ) → - a = 1² + b = 1 + b ( multiply both sides by - 1 )

a = - 1 - b → (1)

(3, 3 ) → \frac{-3b}{2} = \frac{3}{a} ( cross- multiply )

- 3ab = 6 ( divide both sides by - 3 )

ab = - 2 → (2)

Substitute a = - 1 - b into (2)

(- 1 - b)b = - 2 , distribute left side

- b - b² = - 2 ( multiply through by - 1 )

b² + b = 2 ( subtract 2 from both sides )

b² + b - 2 = 0 ← in standard form

(b + 2)(b - 1) = 0 ← in factored form

Equate each factor to zero and solve for b

b + 2 = 0 ⇒ b = - 2

b - 1 = 0 ⇒ b = 1

Substitute these values into (1) for corresponding values of a

b = - 2 : a = - 1 - (- 2) = - 1 + 2 = 1

b = 1 : a = - 1 - 1 = - 2

Thus a = - 2, b = 1 or a = 1, b = - 2

Given that a > b then a = 1, b = - 2

3 0
3 years ago
12x+30=6x-6 find if there are no solution or many solutions
vazorg [7]
Your answer would be X=-6
4 0
3 years ago
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