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ElenaW [278]
2 years ago
13

Solve the system of equations 9x + 2y = 11 and 9x + y = 1 by combining the equations

Mathematics
1 answer:
Dennis_Churaev [7]2 years ago
4 0
The answer to the question

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A bag contains 100 marbles which are red, green, and blue. Suppose a student randomly selects a marble without looking, records
ra1l [238]

Answer:

35 red marbles

Step-by-step explanation:

So we can put the different color marbles in a ratio. So 7:2:11. If we add all of those up we get 20. We do 100/20 to get 5. Each number in the ratio is equivalent to 5 marbles. Then we do 7*5 to get 35. We can check our work by doing, (7*5) + (2*5) + (11*5) = 100. And it does equal 100 so the answer is correct.

6 0
2 years ago
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A news report suggested that an adult should drink a minimum of 4 pints of water per day. Based on this report, determine the mi
zhuklara [117]

Answer:

448 fl oz

Step-by-step explanation:

there are 7 days in a week. 4*7 is 28

28 pints to ounces is 448 fl oz

6 0
2 years ago
Two horses approach each other along the same country road, one walking at 5.5 km/h and the other at 4.5 km/h. When the horses a
lisov135 [29]
We are given with
v1 = 5.5 km/hr
v2 = 4.5 km/hr
d = 10 km
v3 = 30 km/hr

The total time the fly was flying back and forth is
5.5t + 4.5t - 10
t = 1 hr

The total distance traveled by the fly is
d = 30 (1) = 30 km
4 0
2 years ago
what is the value of the constant in the equation that relates the height and width of this rectangle
Doss [256]

The correct answer is C. 1.5

You can find this answer by using any of the points on the graph and putting them into the given equation. Then you can solve for the constant. For the purpose of this example, we will use (10, 15)

Height = Constant * Width ---> Plug in known values.

15 = Constant * 10 ----> Divide both sides by 10

1.5 = Constant

This will work with whatever numbers you use from the graph. Although this graph does not have any others to really choose from.

8 0
2 years ago
What is the quadratic regression equation that fits these data?
Tresset [83]

Answer:

the answer is a.

Step-by-step explanation:

I plugged your data into a graphing calculator, and got a quad reg in the picture.

5 0
2 years ago
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