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prohojiy [21]
2 years ago
10

2x+7y=-20, y=3x+7. solve using elimination

Mathematics
1 answer:
Setler79 [48]2 years ago
8 0

Answer:

(x,y) = (-3,-2)

Step-by-step explanation: Please brainliest!

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Which graph represents the equation -5x+4y>-1?
galben [10]
<h3>Answer: Choice D</h3>

======================================================

Explanation:

The inequality sign has an "or equal to", which means the boundary line will be solid. We can rule out choices B and C because they have dashed boundary lines.

A solid boundary line means that points on the boundary are part of the solution set.

Now let's see what happens when we plug in a point like (x,y) = (4,0). This will tell us how to shade the blue region.

-5x + 4y \ge -1 \\\\-5(4) + 4(0) \ge -1 \\\\-20 \ge -1 \\\\

This is false because -20 is not larger than -1. It's the other way around.

This tells us the point (4,0) is not in the blue shaded region, and it's not on the boundary line either. We can rule out choice A because of this.

The only thing left is choice D, which is the final answer. I recommend plugging a point from this region into the inequality to confirm we have a true statement.

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3 years ago
Find the unit rate. <br><br> 5/8 mile in 1/4 hour
ivolga24 [154]

Answer:

5/8 : 1/4 :: m : 1    proportion

5/8 = m/4               product means/extremes

5/2 = m

Step-by-step explanation:

8 0
2 years ago
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Let x be normally distributed with mean μ = 133 and standard deviation σ = 23. use table 1.
Svetlanka [38]
A) z value =  (x - π) / <span>σ   = 100 - 133 /  23  =  -1.43
p(<= 100) = 0.0764

</span>
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What expression is equivalent 19/38
Alex
I am not going to tell you the answer but i can tell you how to find it out. First you have to put 19/38 on a paper. Then multipy the numarator and denomanator by the same number on the top and bottom which is called a whole number. 19/38 times 2/2 or 3/3 or 4/4 or anything. Your answer is equivalent to 19/38
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This equation in numbers:
(-8x)^6 • (4x)^2
(262144•x^6) • (16x^2)
4,194,304x^8
4 0
3 years ago
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