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
Novosadov [1.4K]
2 years ago
5

Brian scored 92, 87 and 88 on three science tests. Write and solve an equation to find the score Brian will need on the fourth s

cience test so that the mean test score is 90.
Mathematics
1 answer:
Marta_Voda [28]2 years ago
3 0

Answer:

You would need to score a 93% to have an average of 90.

Step-by-step explanation:

Well, to check my work you would need to find the average.

So, 93 + 92 + 88 + 87 = 360. Then you divide by four; 360 / 4 = 90. ^^

You might be interested in
(2(n+1)-1)^2-(2n-1)^2 simplified
Westkost [7]

Answer: 8n

Let's simplify step-by-step.

(2(n+1)−1)2−(2n−1)2

Distribute:

=4n2+4n+1+−4n2+4n+−1

Combine Like Terms:

=4n2+4n+1+−4n2+4n+−1

=(4n2+−4n2)+(4n+4n)+(1+−1)

=8n

7 0
2 years ago
Solve . (5 points) Question 5 options: 1) −20 2) −24 3) 20 4) 24
e-lub [12.9K]

Answer:

18 21 24 24 =87 maybe trying to help

8 0
3 years ago
Simplify.<br> 7x +84/(x + 12)(x+10)
Tasya [4]

Answer:

{7x^2+168x+840}/{x+12}

Step-by-step explanation:

3 0
3 years ago
X^2+2y=19<br> X^2+y^2=34
Katen [24]

Answer:

x=3

y=5

Step-by-step explanation:

3×3=9

5×5=25

9+25=34

[3^2+5^2=34]

3^2=9

2×5=10

9+10=19

[3^2+2×5=19]

5 0
3 years ago
F) As a truck driver, Roland averages 400 miles every 6 hours of driving. How long will it take him to drive
liubo4ka [24]

Answer:

31.5 hours

Step-by-step explanation:

time * speed = distance

speed=400/6=66.67 miles per hour

2100/(400/6)=31.5 hours

6 0
3 years ago
Other questions:
  • What describes lines that have exactly one point in common?
    14·2 answers
  • $600 at 5% for 2 years. whats the balance
    15·1 answer
  • Which algebraic rule describes the transformation? A) (x, y) → (−x, y) B) (x, y) → (x, −y) C) (x, y) → (−x, −y) D) (x, y) → (−y,
    11·2 answers
  • Canceal subscripation
    6·2 answers
  • What is the length, in units, of the hypotenuse of a right triangle if each of the two legs is 2 units? (5 points)
    7·2 answers
  • Mrs. Cousins works in a pool store and earns a 9.5% commission on every swimming pool she sells. How much commission would she e
    5·1 answer
  • please HELPPPPP according to the Marcus trail mix recipe 2 cups of dry food should be used for every 3 1/2 cups of salted nuts a
    9·1 answer
  • Can someone help a friend
    15·1 answer
  • Consider the diagram below where line segment OR is congruent to line segment RE and line segment AB is parallel to line segment
    11·1 answer
  • 2-1+5+10+20-5-1-9+9-1+?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!