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iogann1982 [59]
3 years ago
5

a test has 20 questions it award 3 points is the answer is correct and takes away 1 point if the answer is incorrect . what inte

ger represents the amount of points the student lost?​
Mathematics
1 answer:
Alex73 [517]3 years ago
6 0

Answer:

1(20-x)

Step-by-step explanation:

let the number of correct answers be x

so wrong will be 20-x

1 mark cancelled from each question

therefore,

1(20-x) will be the answer

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Write the slope-intercept form of the equation of the line through the given points.
Yuri [45]
<h3>Answer:  y = 3x+4</h3>

Slope = 3

y intercept = 4

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

Explanation:

Let's find the slope.

m = \text{slope}\\\\m=\frac{\text{rise}}{\text{run}}\\\\m = \frac{\text{change in y}}{\text{change in x}}\\\\m = \frac{y_2-y_1}{x_2-x_1}\\\\m = \frac{7-4}{1-0}\\\\m = \frac{3}{1}\\\\m = 3

The slope is m = 3.

The y intercept is b = 4 due to the point (0,4). The y intercept <u>always</u> occurs when x = 0.

We'll then plug those m and b values into y = mx+b to get the answer y = 3x+4

-----------

As a way to check the answer, plugging x = 0 should lead to y = 4

y = 3x+4

y = 3*0+4

y = 0+4

y = 4

So that works out. Let's try x = 1. It should produce y = 7

y = 3x+4

y = 3*1+4

y = 3+4

y = 7

That works out also. The answer is fully confirmed.

4 0
3 years ago
Which of the following is the greatest *<br> -6*10<br> O<br> -6 - (-10)<br> -6 - 10<br> -6 + -10
kramer

Answer:

-6-(-10)=4

Step-by-step explanation:

Well,

-6*10= -60

0=0

-6-(-10)= -6+10=4

-6-10=-16

-6+-10=-16

7 0
3 years ago
Please help will give brainliest answer
Natasha_Volkova [10]

Answer:

B

Step-by-step explanation:

oh my goodness I don't know

7 0
3 years ago
A scale drawing of a door is 2 cm high. If the scale is 1 cm = 4 meters, what is the actual height of the door?
Vanyuwa [196]
2*4= 8 meters

You could multiply every centimeter by the scale of 4 because 1 cm= 4 meters.

I hope this helps!
~kaikers
4 0
3 years ago
Read 2 more answers
A carton of milk contains 2.5L. If Zoe drinks 250ml twice a day, for how many days will the bottle last? The answer is 5 days bu
frez [133]
The main thing you need to know for this question is this conversion:

1 L = 1000 mL   ,   or 1 liter is equal to 1000 milliliters.

So, let's make the entire problem into milliliters:
The carton of milk has 2,500 mL, and Zoe drinks 500 mL a day (250 twice a day).

To find the number of days the bottle will last, you divide the total amount of milk by the amount she drinks per day:

2,500 / 500 = 5 days 
3 0
4 years ago
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