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
Inga [223]
2 years ago
10

After six biology tests, Ruben has a mean score of 74. What score does Ruben need on the next test to raise his average (mean) t

o 76?
Mathematics
1 answer:
blondinia [14]2 years ago
4 0

Answer:

88

Step-by-step explanation:

this question is a question that involves the use of the statistical principles of finding average

let the summation of the six scores of the biology test be represented as ∑x

∴ ∑x÷ 6=74

∑x=74 × 6

=444

444 is the summation of all the scores of all the six biology scores reuben had

the next test would be his 7th

let y represent the score for the 7th test

therefore, \frac{444 + y}{7} = 76

444 + y = (76 × 7)

444 + y = 532

y=88

Reuben needs to score 88 to raise his average to 76

You might be interested in
18. Solve the inequality. Show your work.<br> –6b &gt; 42 or 4b &gt; –4
grigory [225]
-6b > 42 = b<-7
or
4b > -4 = b>-1
Hope this helps.
6 0
3 years ago
Read 2 more answers
In a race, 47 out of the 50 swimmers finished in less than 35 minutes. What percentage of the swimmers finished the race less th
Dmitry [639]

Answer:

94%

47*2=94

50*2=100

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Calculate the value of x.
Nikitich [7]

Answer:

x = 17deg

Step-by-step explanation:

Let angle y be the unknown angle IN THE TRIANGLE.

Angle y = 180 - 90 - 73

= 17deg

Angle x = Angle y (Alternate angles on 2 parallel lines)

Angle x = 17 deg

8 0
2 years ago
Read 2 more answers
Simplify the following polynomial expression. (5x^4-9x^3+7x-1)+(-8x^4+4x^2-3x+2)-(-4x^3+5x-1)(2x-7)
Anton [14]

Answer:

5x^4 - 37x^3 - 6x^2 + 41x - 6

Step-by-step explanation:

5 0
3 years ago
Two teachers purchase supplies for their classrooms.
inna [77]

Answer:

Cost of One Journal =  $3.99

Cost of One pen =  $0.59

Step-by-step explanation:

Let

Cost of One Journal = x

Cost of One pen = y

We can make equation from given statements.

Mr. Bowden purchases 18 journals and 40 pencils for $95.42.

18x+40y=95.42

Ms. Jacinto purchases 11 journals and 16 pencils for $53.33.

11x+16y=53.33

Now solving these equations to find the value of x

18x+40y=95.42--eq(1)\\11x+16y=53.33--eq(2)

Multiply eq(1) with 2 and eq(2) with 5

36x+80y=190.84\\55x+80y=266.65\\-\:\:\:\:-\:\:\:\;\:\:\:\:\:\:\:-\\---------\\-19x=-75.81\\x=\frac{-75.81}{-19}\\x=3.99\\

We get the value of x is: x=3.99

Now, putting value of x in equation 1 to find value of y.

18x+40y=95.42\\18(3.99)+40y=95.42\\71.82+40y=95.42\\40y=95.42-71.82\\40y=23.6\\y=\frac{23.6}{40}\\y= 0.59

So, we get the value of y: y = 0.59

Now, finding the costs:

Cost of One Journal = x = $3.99

Cost of One pen = y = $0.59

7 0
2 years ago
Other questions:
  • HELP!!!!!!!!!!!!!!!!!!! ASAP !!!!!!!!!!!!!!!!!!!!!!!!!!!!
    10·1 answer
  • Solve for 30 points 1 Thanks and 5 stars and maybe brainiest
    10·2 answers
  • What is the slope of CD <br><br><br> 1/4<br><br><br> -4/1<br><br><br> -1/4<br><br><br> 4/1
    15·1 answer
  • Help find the slope please!!
    14·1 answer
  • The function f is defined by f(x)=200÷x−b, where b is a constant. Find b, if the value of f at x= 1/3 is equal to 150.
    12·1 answer
  • PlZ HELP Goddessboi Will give brainliest!!!!!! THX have a great day!
    14·2 answers
  • Elena ate 2/8 of a pizza and Dylan ate 1/5. Use the number lines and benchmark fractions to estimate how much of the pizza they
    6·1 answer
  • Indicate whether each of the following fractions is proper or improper.
    7·2 answers
  • If the diameter of a circle is 5 centimeters, how long is the arc subtended by an angle measuring 60° ?
    6·2 answers
  • I need help in both answers ASAP!!!!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!