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Lady bird [3.3K]
4 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]4 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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Solving a Quadratic Equation
Dafna1 [17]

Answer:

The factored form of the equation is (x + 4)(x – 6) = 0.

Step-by-step explanation:

(x – 4)(x + 2) = 16

Foil the left side

x^2 +2x-4x-8 =16

Combine like terms

x^2 -2x-8 = 16

Subtract 16 from each side

x^2 -2x-8-16 =16-16

x^2 -2x-24 =0

Factor the left hand side

What two numbers multiply to -24 and add to -2

-6*4 =-24

-6+4 = -2

(x-6) (x+4) =0

Solving using the zero product property

x-6 =0   x+4=0

x=6        x=-4

7 0
3 years ago
Read 2 more answers
What is the value of a?<br> 45°<br> (2x-5)
aniked [119]

Answer:

x=70

Step-by-step explanation:

To solve this problem, you set up the equation 45+(2x-5)=180

Next, subtract 45 from 180 to get the equation 2x-5=135

After that, add 5 to 135 to get 2x=140

Divide 140 by 2 to get X=70

7 0
3 years ago
What’s the answer ??? (SOMEONE PLEASE HELP)
xxTIMURxx [149]
It's the first one. That is a perfect square polynomial, which, when factored, will give you the same binomial twice, or multiplicity 2.  It will factor to g(x)=(x+9) ^{2}, where the vertex (h, k), is (-9, 0).
5 0
3 years ago
Determine is the solution set for the system of equations shown is the empty set contains one point or is infinite X+2y=0; 2x+4y
Sedaia [141]
We can use elimination to solve the system:

x+2y=0           Multiply the first equation by negative 2 so we can eliminate
2x+4y=0

-2-4y=0         Add them, -2X+2X= 0, -4Y+4Y= 0
2x+4y=0                   

0=0 

Since 0 is indeed equal to 0 you have INFINITELY MANY SOLUTIONS.

you could also put both equation in slope intercept form and see if the slopes and Y-intercept are the same.

4 0
4 years ago
Determine the x- and y-intercepts of the graph of y=−1/3x+3 .
andrey2020 [161]
X-intercept : -9 (-9,0)
y-intercept: 3 (0,3)
3 0
3 years ago
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