1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
serious [3.7K]
2 years ago
9

A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is

the number of 3-point questions and y is the number of 5-point questions, the system shown represents this situation.
x + y = 24

3x + 5y = 100

What does the solution of this system indicate about the questions on the test?

The test contains 4 three-point questions and 20 five-point questions.
The test contains 10 three-point questions and 14 five-point questions.
The test contains 14 three-point questions and 10 five-point questions.
The test contains 20 three-point questions and 8 five-point questions.
Mathematics
1 answer:
aniked [119]2 years ago
7 0

Answer:

10 three-point questions and 14 five-point questions.

Step-by-step explanation:

x+y = 24

3x+5y = 100

We can solve this system of equations using elimination. In order to do this, let's first multiply the first equation by 3...

3x+3y=72

3x+5y=100

Now, subtract the first equation from the second equation...

2y=28

Divide both sides by 2

y=14

Plug this back into any of the equations to solve for x...

x+14=24

x=10

There were 10 three-point questions and 14 five-point questions

You might be interested in
Mary chooses an integer at random from 1 to 6. What is the probability that the integer she chooses is a prime number?
Tpy6a [65]

Answer: 3 out of 6

Step-by-step explanation:

The numbers she choses from are 1-6 therefore its out of 6

The prime numbers before six are two, three, and five.

therefore its 3/6 chance or 1/2 chance she picks a prime number.

5 0
3 years ago
It takes Lara 1/3 hour to walk to the library 3/4 mile away. What is her walking pace?
stiv31 [10]
2 1/4 miles per hour.
6 0
3 years ago
Read 2 more answers
EASY MATH!!! GIVING BRAINLIEST!!
musickatia [10]

Answer:

55

Step-by-step explanation:

So lets take our 50 dollars.

Next, take your increase of 5%. Remember, 5% is 0.05, and it is a increase of 5%, so we are multipling 50 by 1.05.

Before we start multiplying, lets recall that this occurs twice(2 years), but this doesnt mean we multiply 50 by 1.10. No, we just mutiply 50 by 1.05 2 times:

50*1.05

=

52.5

52.5*1.05

=

55.25

So your answer is 55 dollars(rounding down).

Hope this helps!

4 0
2 years ago
Question 1 options:<br><br> 3<br><br><br> 8<br><br><br> 12<br><br><br> 2.5
rewona [7]

Answer:

2.5

Step-by-step explanation:

(I'm assuming you're doing this the same way I learned it, if not I'm sorry if it doesn't make sense)

\frac{2}{x}=\frac{12}{15}

Cross multiply

12x=30

Divide

x=2.5

This is just one way to do the problem. An easier way is to simplify the fractions.

\frac{2}{x}=\frac{4}{5}

You can either cross multiply or figure out that 2 is half of four and simply divide 5 by 2 which will also result in 2.5

5 0
3 years ago
234/8 as a mixed number
uysha [10]
Calculate out how many times the denominator goes into the numerator. To do that, divide 234 by 8 and keep only what is to the left of the decimal point:
8 0
3 years ago
Other questions:
  • The owner of Kat Motel wants to develop a time standard for the task of cleaning a cat cage. In a preliminary study, she observe
    7·1 answer
  • How many solutions does the system have?
    15·1 answer
  • 15. Greg and Alana went out to dinner. Their dinner bill came to $68.89.
    6·1 answer
  • Mei needs 60 paper plates for a birthday party. she already has 12 two plates and 14 red plate how many more plates should reall
    10·1 answer
  • What are the next two terms in the pattern 3,6,5,10,9,18,17
    13·1 answer
  • What is 226 rounded to the nearest hundred
    10·2 answers
  • You by six notebooks and a backpack. The cost of the backpack is $17.90. You pay 6 dollars in sales tax. Your total bill is $30.
    14·1 answer
  • What percent of 61 is 152.5?
    6·2 answers
  • While traveling to his grandmother's house for Christmas, George fell asleep halfway through the journey. When he awoke, he stil
    6·1 answer
  • Please help with this geometry question ASAP. Also please show work
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!