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
Eva8 [605]
3 years ago
9

Natalie was given a 30 question test. For each correct question she answered, she earned 2 points. For every incorrect answer sh

e lost 1 point. Her final score was 54 points. The system of equations describes the relationship between the number of questions she answered correctly and the number of questions she answered incorrectly. Part of the solution of the equations is y = 2. What does this value represent?
x+y=30
2x−y=54


A. the number of questions Natalie answered incorrectly
B the number of questions Natalie answered correctly
C. the number of points Natalie lost from questions she answered incorrectly
D. the number of points Natalie earned from questions she answered correctly
Mathematics
1 answer:
RideAnS [48]3 years ago
8 0
T<span>he number of questions Natalie answered incorrectly.</span>
You might be interested in
Please let me know the correct answer.
NNADVOKAT [17]

Set h to 640 and solve for t:

640 = -490t^2 + 1120t

Subtract 640 from both sides:

-490t^2 + 1120t - 640 = 0

The formula to solve a quadratic equation is:

x = -b -/+ sqrtroot (b^2-4ac)/(2a) where a = -490, b = 1120 and c = -640

Solve:

x = -1120 -/+ sqrtroot (1120^2-4(-490)(-640) )/ 2(-490)

x = 8/7 = 1.1428 = 1.14

Time was 1.14 seconds

4 0
3 years ago
Emilio bought an ant farm that had 15 ants in it already. He read somewhere that
Nina [5.8K]

The number of ants in his farm after 12 weeks is 218.

Step-by-step explanation:

Step 1:

It is given that there are 15 ants initially and the ant population increases by 25% each week.

This is an exponential rate of increase that can be modeled by the following equation:

Number of ants after n weeks = Initial number of ants * (1 + rate of increase) ^{n}

Step 2:

Rate of increase = 25% = 25 / 100 = 0.25

Number of weeks = 12

Number of ants  after 12 weeks = 15* (1 + 0.25 )^{12} = 218.27 (rounded off to 218)

Step 3:

Answer:

The number of ants in his farm after 12 weeks is 218.

6 0
3 years ago
Truth or false every fraction has a limited number of equivalent frections .
xeze [42]

Answer:

False.

Since the number of numbers in the world is infinite, there can be an infinite number of equivalent fractions.

4 0
3 years ago
Read 2 more answers
I need the answer please and can u answer my recent to.
ale4655 [162]

Answer:

30 hours.

Step-by-step explanation:

Richard can build 15 snowballs in 1 hour

But 2 snowballs melt every 15 minutes

In 1 hour, the number of snowballs that will have melted is:

\frac{60}{15} × 2 = 8

The number of snowballs that will have remained = 15 - 8 = 7

So 7 snowballs will have remained in 1 hour

For 210 snowballs to have remained, it will take:

\frac{210}{7} × 1 = 30 hours.

3 0
3 years ago
Use the proportion of the triangle enlargement to find the missing measure of the enlarged triangle.
My name is Ann [436]
3. Simplify: 144 = 6x
4. Divide: x = 24
8 0
3 years ago
Read 2 more answers
Other questions:
  • HELP ME PLEASE I NEED HELP ASAP
    11·1 answer
  • Charlie runs at a speed of 3 yards per second. About how many miles per hour does Charlie fun?
    8·2 answers
  • Which term describes the point where the three altitudes of a triangle intersect?
    14·2 answers
  • What theorem or postulate can be used to justify that HIG=FIE
    15·2 answers
  • Anybody knows this one
    8·2 answers
  • Please help me with this problem asap
    10·1 answer
  • How many kilometers are equivalent to 3,570 meters?
    11·1 answer
  • 9/47
    7·1 answer
  • 4. The money in Mrs. Finch’s savings account is earning 1.45% interest. Which number below is greater than 1.45%
    8·1 answer
  • Which of the following measures of center and variation describe the data set below: 32,38,44,62,17,29,36,45
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!