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
OLga [1]
3 years ago
10

On his first three tests, Shaun scored 88, 98, and 79. What score must he get on his fourth test to have an average (mean) of 80

for all four tests?
Mathematics
1 answer:
solniwko [45]3 years ago
7 0

Answer:

Step-by-step explanation:

let score in fourth test=x

88+98+79+x=80×4

265+x=320

x=320-265=55

You might be interested in
HURRY NEED HELP NOW 42 POINTS NEED 1 PARAGRAPH FOR EACH QUESTION there are 2 photos I put up and that where the questions are.
Shtirlitz [24]
1. All you have to do to find the area of the figure. IS first find the area of the rectangle. This is easy because all you have to do is base times height. 

22 x 17 =  374

Now to find the area of the triangle all you have to do is  do base times height like a rectangle, but then divide it by 2 afterwords.
19 x 12 = 228 ÷ 2  = 114.

Now add the two area's together:

374 + 114 = 488.

Just do the same with the one below, I've altered the pic a bit to make it easier. 



4 0
3 years ago
Who can help me with this plzz
Brrunno [24]
.04d + 20. 

This is because even with no miles they charge 20 more and then 4 cents more for any additional mile. 
6 0
3 years ago
Four times a number<br> decreased by ten is 34.<br> Write an equation &amp; solve.
igomit [66]
4x - 10 = 34
4x +10 +10
4x = 44
4x/4 = 44/4
x = 11
5 0
3 years ago
Number 1- equivalent expression for 3(x +5) +4x -8?
Dominik [7]

Answer: look at the picture

Step-by-step explanation: Hope this help :D

6 0
3 years ago
Screenshot of the question attatched. please help me
Law Incorporation [45]
<h2>Rules of Exponents</h2>

There are many rules that apply to operations involving exponents. In this question, we'll need the following:

<h3>The division rule</h3>
  • ⇒ \dfrac{a^n}{a^m}=a^{n-m}

<h2>Solving the Question</h2>

We're given:

z^{21}\div z^7=z^k (solve for k.)

⇒ Rewrite as a fraction:

\dfrac{z^{21}}{z^7}=z^k

⇒ Use the division rule:

z^{21-7}=z^k\\z^{14}=z^k\\14=k

Therefore, the value of <em>k</em> is 14.

<h2>Answer</h2>

<em>k</em> = 14

5 0
2 years ago
Other questions:
  • A new car is purchased for 19700 dollars. The value of the car depreciates at
    6·1 answer
  • Factor: X squared -9 = 0
    7·1 answer
  • Julie earned $25 this is 5 times as much as what Lisa earned how much did Lisa earn
    13·2 answers
  • What are the x and y-intercepts of the line described by the equation?
    10·2 answers
  • For g(x)=x^2-2, determine g(x+2)
    15·1 answer
  • Once there was a girl with five lollipops. i took them because i did not eat breakfast. so how many are left. If you delete my q
    9·1 answer
  • An angle measures 10° more than the measure of its complementary angle. What is the
    7·1 answer
  • Please help mee best answer will get brainliest.
    5·2 answers
  • Arby's advertises $5 for 3 Beef and Cheddar sandwiches. How much is the per sandwich?
    6·2 answers
  • Find parametric equations for the sphere centered at the origin and with radius 3. Use the parameters s and t in your answer. x(
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!