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
Setler [38]
2 years ago
15

Karl earned scores of 58, 88, 80, and 70 on his first 4 Chemistry tests. What is the minimum score he needs to earn on his fifth

test to ensure that his average score for the 5 tests will be at least 75 ?
Mathematics
2 answers:
OLga [1]2 years ago
8 0

Answer:

79

Step-by-step explanation:

(58+88+80+70+ x)/5=75

75*5=296x

375=296x

x=375-296

x=79

vichka [17]2 years ago
8 0

Answer: 50

Step-by-step explanation:

First let's set up an equation by calling the score he needs to get, x:

\frac{58 + 88 + 80 + 70 + x }{5} = 75

58 + 88 + 80 + 70 + x = 75 x 5

296 + x = 375

x = 79

You might be interested in
Jak wykonać to zadanie​
balandron [24]

Step-by-step explanation:

jsjsjsjshjososnsnxjxjxjxjxjdjdj

8 0
2 years ago
Simplify: (x + 7)(x-4)<br> A. 2r +3<br> B. 12-28<br> C. x2-3x - 28<br> D. x2 + 3x - 28
jeka57 [31]

Answer:

(x + 7)(x - 4) = x2 - 4x + 7x - 28 = x2 + 3x - 28

7 0
2 years ago
Calculate the area of a circle with the radius of 5cm (1dp)
quester [9]

Answer:

25π ≈ 78.5 cm squared

Step-by-step explanation:

Area of circle= πr²

Substitute: π(5)²

Solution: 25π or about 78.5 cm²

7 0
3 years ago
The area of a square is 49 cm^2. What is the perimeter, in cm, of the square?
rewona [7]

Answer:

P = 28 cm

Step-by-step explanation:

The area of a square is

A = s^2 where s is the side length

49 = s^2

Taking the square root of each side

sqrt(49) = sqrt(s^2)

7 =s

Now find the perimeter of the square

P = 4s

P = 4(7)

P = 28 cm

6 0
2 years ago
Read 2 more answers
When renting a limo for prom, the number of people varies inversely with the cost per person. Originally there were 4 people and
ioda

Answer:The new cost per person= $19 when there are 12 people

Step-by-step explanation:

Step 1

Let Number of people be rep as N

And Cost per person = C

such that the relationship of  number of people which varies inversely with the cost per person is given as

N∝ 1/C

Introducing constant of proportionality, k, we have that

N= K/C

such that when there were 4 people the cost per person was $57, K would be

N= K/C

4 = K /57

k= 57 X 4

k=228

Step 2

Therefore If the number of people changed to 12, cost per person would be

N= K/C

12= 228 / C

C= 228/12

C= 19

The new cost per person= $19 when there are 12 people

4 0
2 years ago
Other questions:
  • I'm stuck on this question, any ideas? thanks
    11·2 answers
  • Identify the slope y-intercept of the function y= -2x + 3.​
    5·1 answer
  • Simplify: - 3/2(4x + 3)
    15·1 answer
  • Help please.. having trouble with this question
    10·1 answer
  • Answer on number 10 please? cleanup on isle 10 please?
    13·1 answer
  • What is 20 over 3 divided into its simplest form?
    15·1 answer
  • Can someone help me with this problem
    10·1 answer
  • 18 PLS ILL MAKE U BRAINLYIST
    9·1 answer
  • 9000 dollars is placed in an account with annual interest rate of 7.75 how much will be in the account in 18 year nearest cent
    14·2 answers
  • Helpp!! i need help in number 7, 8, and 9 PLEASE i will give brainlest and alot of points!!!!​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!