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Mumz [18]
3 years ago
13

Please help if you can! I'll mark brainiest if you're right;; Thank you in advance :D

Mathematics
1 answer:
Stels [109]3 years ago
5 0

Answer:

[83, 100]

Step-by-step explanation:

Lowest score to get a B is 80

Total 4 tests,  to get at least a B  :  80 x 4 = 320

Total 3 test scores = 81 + 62 + 94 = 237

So the fourth test to get at least a B: 320 -237 = 83

Answer [83, 100]

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4x+y+6z=7 <br> 3x+3y+2z=17<br> -x-y+z=19
alisha [4.7K]

Answer:

the 2nd one

Step-by-step explanation:

3 0
3 years ago
Rachel decided to have bouncy balls as a party favor. She determines that her ratio of bouncy ballsTwo guest is 9:3. Explain how
crimeas [40]

Just multiply or divide the ratio to get each number to 30.

7 0
3 years ago
Read 2 more answers
The equation y=750x represents the number of dollars y Olivia earns in x weeks. Determine if there is a constant of variation. I
Klio2033 [76]

Answer:

<h3>There is a constant of variation in the equation and it is 750. This means that the amount olivia earns increases by $750 every week.</h3>

Step-by-step explanation:

Given the equation y = 750x which represents the number of dollars y Olivia earns in x weeks, from the equation, it can be inferred that the number of dollars olivia earns is DIRECTLY PROPORTIONAL to the number of weeks. This relationship is therefore a direct variation.

In direct variation, increase in a variable will lead to corresponding increase in the other variable and vice versa by a factor known as the constant of variation.

For example if y is directly proportional to x, it is written mathematically as shown;

y\alpha x

y=kx\\

k = y/x

where k is the constant of proportionality.

comparing the general expression above with the equation in question,

y = 750x

k = 750

Therefore we can conclude that there is a constant of variation in the equation and it is 750. This means that the amount olivia earns increases by $750 every week.

5 0
3 years ago
A line passing through which of the following pairs of coordinates represents a proportional relationship? A. (1, 3) and (2, 6)
trasher [3.6K]

Answer:

Answer is A - (1, 3) and (2, 6)

Step-by-step explanation:

(1, 3) • 2

= (1 • 2, 3 • 2)

= (2, 6)

Ratio: 2/2, 6/2

Therefore, the answer is A.  

3 0
2 years ago
Read 2 more answers
What is the equation of the line in the graph
olga2289 [7]

the equation of the line is y = 3.

the slope of the line is 0.

the y-intercept is 3, so plug it into the slop-intercept-form equation:

y = mx + b

y = 0x + 3

y = 3

hope this helps!

8 0
2 years ago
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