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Helga [31]
3 years ago
15

deanna gets 3 problema incorrect on her math quiz. her score is 85%. how many questions are on the quiz

Mathematics
2 answers:
never [62]3 years ago
8 0
Let's start by seeing what percentage is incorrect.
100-85=15
So, 15% is incorrect when answering 3 problems wrong. So let's divide 15 by 3.
15÷3=5
So, each problem is worth 5%, let's divide 100 by 5. The reason I'm doing thiis is to find how many questions are on the quiz, since if you got them all right, it's 100.
100÷5
20
There are 20 questions, let's make sure this is correct.
If she got 3 wrong, she got 17 right. Let's calculate her percentage and make sure it is the right one.
17÷20
.85×100
85%
So, there are 20 questions on the math quiz.
earnstyle [38]3 years ago
3 0
Alright, So Usually, The Highest Score You Can Get On A Quiz Or Homework Sheet Is 100%. Let’s Assume The Best Score You Can Get Is 100%.

100 (Highest Score) - 85 (Score) = 15

15 Divided By 3 = 5

So, Each Problem That You Got Correct You Earned 5 Points.

Then, You Can Do 100 Divided By 5, Which Equals 20.

There Was 3 Problems Incorrect, So 20 - 3 = 17.

Then, 17 Divided By 20 = 0.85, Which Equals 85%.

Therefore, There Were 20 Questions On The Quiz.
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What is the equation of the line with a slope of 3/4 that goes through the point (4, 1) in slope-intercept form?
Svetach [21]

Answer:

y=\frac{3}{4}x+-2

Step-by-step explanation:

We do not have enough information for slope intercept form. But we can use the point-slope formula to find the information. The formula is y -y_{1} =m(x -x_{1}) where we substitute a point (x,y) for (x_{1},y_{1}).  

We have m=3/4 and (4, 1). We input m and x_{1} =4\\y_{1}=1.

y-1=\frac{3}{4} (x-4)

We now simplify the parenthesis and solve for y.

y-1=\frac{3}{4} (x-4)\\y-1=\frac{3}{4}x+\frac{3}{4} (-4)

We convert -4 into a fraction with 1 as the denominator.

y-1=\frac{3}{4}x+\frac{3}{4} (\frac{-4}{1} )\\y-1=\frac{3}{4}x+\frac{-12}{4}\\y-1=\frac{3}{4}x+-3

We add 1 to both sides to isolate y,

y-1+1=\frac{3}{4}x+-3+1\\y=\frac{3}{4}x+-2

This is slope intercept form. The line as slope 3/4 and y-intercept (0,2) or b=2.

4 0
3 years ago
An angle measures 44° less than the measure of its complementary angle. What is the measure of each angle?
ryzh [129]

a+b=90°

a=b+44°

b+44°+b=90°

2b+44°=90°

2b=90°-44°

2b=46°

b=23°

a=23°+44°

a=67°

8 0
2 years ago
Figure f is a scaled copy of Figure e.
Mekhanik [1.2K]

The correct equation of the scaled figure is given by 6/3 = 4/a

<h3>Scaling</h3>

Scaling is the process of either increasing or decreasing the size of a figure by a factor.

From the diagram attached, Figure f is a scaled copy of Figure e. Figure e is decreased to produce figure f, hence:

  • AB/XY = CD / WZ
  • 6/4 = 3 / a
  • 6/3 = 4/a

The correct equation of the scaled figure is given by 6/3 = 4/a

Find out more on scaling at: brainly.com/question/10253650

4 0
2 years ago
J- 7.5 = 16.937 ????
Leviafan [203]
Add 16.937 and 7.5. It's basically doing the problem backwards.
8 0
3 years ago
Hello me please I have a f
sattari [20]

Answer:

7/3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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