All categories

2 years ago

A test is worth 60 points. Multiple-choice questions are worth 2 points, and

Mathematics

1 answer:

Effectus [21]2 years ago

7 0

Answer:

C. The number of multiple-choice questions plus the number of

short-answer questions is 15.

Step-by-step explanation:

This question can be solved using a system of equations.

I am going to say that:

x is the number of multiple-choice questions

y is the number of short-answer questions.

Multiple-choice questions are worth 2 points, and short-answer questions are worth 5 points.

This means that:

$2x + 5y = 60$

The test has 15 questions.

This means that:

$x + y = 15$ .

Which means that option C is the correct answer.

You might be interested in

Nikitich [7]

Answer:

120 divided by 10 is 12. 120 divided by 12 is 10.

3 0

2 years ago

There are 88 seats in a theater the seating in the theater is split into 4 identical sections. Each section has 14 red seats in

viktelen [127]

14 red 8 blue
88/4 =22
22-14 = 8
I think this if correct

3 0

2 years ago

Solve the quadratic equation by completing the square.<br> x²–2x-12=0

inn [45]

Answer:

$(x-1)^2-13=0$

$x = \sqrt{13}+1$

Step-by-step explanation:

Completing the square is a method of rewriting a quadratic equation in the standard form such that it is in vertex form. The first step is to group the linear and quadratic terms, then factor out the coefficient of the quadratic term. After doing so, complete the square, add a value such that the linear and quadratic terms form a perfect square trinomial. Do not forget to balance the equation. The final step is to simplify.

$x^2-2x-12=0$

Group,

$(x^2-2x)-12=0$

Complete the square,

$(x^2-2x+1)-12-1=0$

Simplify,

$(x-1)^2-13=0$

Now solve the equation using inverse operations,

$(x-1)^2-13=0\\\\(x-1)^2=13\\\\x-1=\sqrt{13}\\\\x = \sqrt{13}+1$

7 0

3 years ago

5. Which of the following equations would

Finger [1]

Answer:

Step-by-step explanation:

for A if you subtract 3 from both sides and divide by 10 from both you get x = 0 so that has infinate solutions

for B you add 8 to both sides and divide by 16 getting the same thiong as A

For C you ditribut 4 to 2x and -3 getting 8x-12=8x-12 if you solve it you get the answer as A & B

For D if you subtract 12 from one side you get -6x = -6x -12 (-12)

causing you not to be able to solve it

7 0

3 years ago

TASK 3= 50 POINTSSS

Nadusha1986 [10]

$After \: 1 \: year:25400 + 25400 \times 11\% = 25400 + 25400 \times 0.11 = 25400(1 + 0.11) = 25400 \times 1.11 \\ After \: 2 \: year:25400 \times {1.11}^{2} \\ After \: x \: year:25400 \times {1.11}^{x} \\ We\: have\: an\: inequality:25400 \times {1.11}^{x} > 501170 \\ \Leftrightarrow {1.11}^{x} > \frac{50117}{2540}\\ \Leftrightarrow x > \log _{1.11}(\frac{50117}{2540}) \\ \Leftrightarrow x>29\\\Rightarrow After\: 29\: years$

4 0

3 years ago