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Lady bird [3.3K]
3 years ago
7

A test has 20 questions worth 100 points. The test consists of true/false questionsworth 3 points each and multiple choice quest

ions worth 11 points each. How many multiple choice questions are on the test?
Mathematics
1 answer:
Artist 52 [7]3 years ago
7 0
X for number of true/false questions and y for number of multiple choice questions:

3x+11y=100
x+y=20
Solve the system and the answer is 5 multiple choice questions.
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Inga [223]

Answer:

A = 3

B = -5

C = 2

Step-by-step explanation:

The way to format a quadratic equation is: ax^2 + bx + c, so the first step to solving this is to format it in the right way, where the x^2 comes first, the x second, and the number alone.

After formatting, your equation should look like this: 3x^2 - 5x + 2

From here, you can see the the <em>a </em> is 3, the <em>b</em> is -5, and the <em>c </em>is 2

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3 years ago
Solve the system of equations below by graphing them with a pencil and paper. Enter your answer as an ordered pair.
sergejj [24]
Y = 2x - 3 . . . (1)
y = -2x + 5 . . . (2)
Equating (1) and (2),
2x - 3 = -2x + 5
2x + 2x = 5 + 3
4x = 8
x = 8/4 = 2
x = 2
y = 2(2) - 3 = 4 - 3 = 1
y = 1

Solution = (2, 1)
6 0
2 years ago
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Points b,d, and f are midpoints of the sides of triangle ACE. EC=30 and DF= 17 find AC
Margaret [11]

Answer:

Your answer should be AC=2DF=34

Step-by-step explanation:


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2 years ago
Classify the following triangle. Check all that apply.
xeze [42]

Answer:

Option A and B

Step-by-step explanation:

sides of the triangle have been given as 15, 15.8, 30 units.

angles of the same triangle has been given as 70°, 80°, [180-(70+80)] or 30°.

Here we see all sides and all the angles of the given triangle have different measures ( all the three sides and angles are different )

By the definition of scalene triangle the given triangle will be scalene.

Since all three angles of the triangle are acute angles (less than 90°).

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