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Lorico [155]
3 years ago
14

Solve the system of equations -3y-4x=-11 3y-5x= -61

Mathematics
1 answer:
k0ka [10]3 years ago
7 0
The solution is, x=8, y=-7
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Tell whether the ordered pair is a solution of the linear system. (-4,-6); -3x+y=6, -2x+y=-8
harkovskaia [24]
Plug them in... -4=x -5=y

-3x-4+-6=6 (check)
-3x-4=12-6=6 (ordered pair works with this equation)

-2x-4+-6=-8 (check)
-2x-4=8-6=2 (ordered pair does not work with this equation)

Therefore the ordered pair IS NOT the solution.

Hope this helps :)

8 0
3 years ago
What is the median of 1, 3, 6, 8, 9, 9<br> Answer choices: A. 6<br> B. 7<br> C. 8<br> D. 9
luda_lava [24]

Answer:

B

Step-by-step explanation:

The median is the middle value of the data arranged in ascending order. If there is no exact middle value then it is the average of the values either side of the middle.

1,  3,  6,  8,  9,  9

           ↑ middle

median = \frac{6+8}{2} = \frac{14}{2} = 7 → B

8 0
3 years ago
Read 2 more answers
The two triangles below are similar. Which pair are corresponding sides?
yanalaym [24]

Answer:

MN : QR

LN : PQ

LM : PR

Step-by-step explanation:

The ratio seems to be 1 : 2.2

So the corresponding sides are:

MN : QR

LN : PQ

LM : PR

7 0
3 years ago
Soda Tak claims that Diet Tak has 40mg of sodium per can. You work for a consumer organization that tests such claims. You take
Mashutka [201]

Answer:

Z - score = 2.83

Step-by-step explanation:

Given the following :

Number of samples (N) = 60

Sample mean (x) = 41.9mg

Population mean (μ) = 40mg

Population standard deviation (sd) = 5.2

Using the relation :

Z = (x - μ) / (sd / √N)

Z = (41.9 - 40) / (5.2 / √60)

Z = 1.9 / (5.2 / 7.7459666)

Z = 1.9 / 0.6713171

Z = 2.8302570

Therefore, the z-score = 2.83

4 0
3 years ago
Simplify -tan(-x)cot(-x)
WINSTONCH [101]
-sin(-x)/cos(-x)*cos(-x)/sin(-x)
Simplifying, we get 1
8 0
3 years ago
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