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Damm [24]
3 years ago
15

Solve the system using elimination. 4x + 5y = 2 2x + 3y = 0

Mathematics
2 answers:
mina [271]3 years ago
8 0

Answer:

x = 3

y = -2

Step-by-step explanation:

4x + 5y = 2........i

2x + 3y = 0........ii

Let's start by eliminating x, so we multiply i by 2 and ii by 4

2|4x + 5y = 2

4|2x + 3y = 0

So that we have

8x + 10y = 4..........iii

8x + 12y = 0..........iv

Subtracting iv from III, we have

-2y = 4

y = 4/-2

y = -2

Going ahead and substituting this value of y in eqn i, we have

4x + 5(-2) = 2

4x - 10 = 2

4x = 2 + 10

4x = 12

x = 12/4

x = 3

Illusion [34]3 years ago
7 0

Answer:

X= 3

Y= -2

Has to be negative to be able to equal zero.

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Illusion [34]

Answer:

what full work.Everyone wants to know so we can help you.

Step-by-step explanation:

5 0
3 years ago
I need help with number 19
inysia [295]
Let's start by understanding that the graph is a linear line. We have a common difference if 4.5 for every 10x we have more.

We can start by finding the gradient, using rise over run. Let's take (10, 4.5) and (20, 9)

Our rise is 9 - 4.5 = 4.5 and our run is 10. Then, our gradient becomes 4.5/10 = 0.45

Now, we can substitute points using the point-slope form.

y - 4.5 = 0.45(x - 10)
y - 4.5 = 0.45x - 4.5
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4 0
3 years ago
Which of the following is not a way to represent the solution of the inequality 2(x + 1) greater than or equal to 20?
Goshia [24]

Answer:

option C

A number line with a closed circle on  9 and shading to the left

Step-by-step explanation:

we have

2(x+1)\geq 20

solve for x

2x+2\geq 20

Subtract 2 both sides

2x+2-2\geq 20-2

2x\geq 18

Divide by 2 both sides

x\geq 9 --------> is equivalent to 9 \leq x

The solution is the interval--------> [9,∞)

All real numbers greater than or equal to 9

A number line with a closed circle on  9 and shading to the right

3 0
3 years ago
Read 2 more answers
5.
Gennadij [26K]
The common ratio is 5 because each number is being multiplied/divided by 5
6 0
3 years ago
Shen has bought tickets for a raffle. The odds in favor of his winning are 1:5. What is the probability of his winning?
gladu [14]

Answer:

Winning = (0.1667) or 16.6667%

Losing = (0.8333) or 83.3333%

Step-by-step explanation:

"Odds for" winning: 1:5

"Odds against" winning: 5:1

6 0
3 years ago
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