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
Alina [70]
3 years ago
14

Andrew has these marks: English 82% French 75% history 78% science 80% What mark will Andrew need in math if he wants his mean m

ark to be each percent? i)80% ii)81% iii)82%
Mathematics
1 answer:
Darina [25.2K]3 years ago
5 0
Sometimes, the strategy guess and check is the simplest. 82, 75, 78, and 80.
i) Let's try 80. All added together is 395 divided by 5 is 79%, which isn't enough. Now trying 85, the mean would be 80%.
ii) Let's try 90's mean. It's 81%.
iii) First, I'm going to try 95. The percentage mean is 82%
I didn't have to guess for ii) and iii) since I saw a pattern happening.
You might be interested in
Solution of the equation<br> 3x/5+1=4x/15+7
Anika [276]

Answer:

x = 18

Step-by-step explanation:

Given

\frac{3x}{5} + 1 = \frac{4x}{15} + 7 ( subtract 1 from both sides )

\frac{3x}{5} = \frac{4x}{15} + 6

Multiply through by 15 to clear the fractions

9x = 4x + 90 ( subtract 4x from both sides )

5x = 90 ( divide both sides by 5 )

x = 18

4 0
2 years ago
Mason is preparing for an endurance running competition. On Friday, he ran 15 3/5 miles. On Saturday, he ran twice as much as he
REY [17]
He ran for 34 and 19/20 miles
7 0
3 years ago
Read 2 more answers
A jar contains, cardinal and
natulia [17]

Answer:

D

Step-by-step explanation:

ince the only colors are white, green, yellow, red, and purple, we can see that NOT getting red or purple is the same as GETTING white, green or yellow

So, P(NOT getting red or purple) = P(GETTING white, green or yellow)

There are 60 jellybeans in total.

Number of jellybeans that are white, green or yellow = 22 + 18 + 11 = 51

So, P(GETTING white, green or yellow) = 51/60

= 17/20

= 0.85

Answer: D

4 0
3 years ago
The use of air bags in cars reduces the force of impact by a factor of 110.(The resulting force is only as great.) What can be s
Vadim26 [7]

Answer:

C. It increases by a factor of 110

Step-by-step explanation:

For Plato

5 0
3 years ago
(14+42-6)/10+7^2 order of operation
Rainbow [258]

Answer:

54

Step-by-step explanation:

\dfrac{(14+42-6)}{10}+7^2

Parentheses (14 + 42 - 6) = 50:

⇒ 50/10 + 7²

Exponents 7² = 49:

⇒ 50/10 + 49

Multiplication/division  50/10 = 5:

⇒ 5 + 49

Addition/subtraction:  5 + 49 = 54

⇒ 54

6 0
2 years ago
Other questions:
  • What is the square of 6​
    7·1 answer
  • How do you use benchmark to estimate 2.81 + 3.72
    9·1 answer
  • Find an odd number with 3 digits such that all the digits are different and add up to 15. The difference between the first two d
    8·1 answer
  • Help please and explain why
    8·1 answer
  • Find the volume of the sphere to the nearest whole value. The volume is ________ in3
    5·1 answer
  • Counting Cookies: Hannah baked 120 peanut butter chocolate chip cookies. She
    5·1 answer
  • What is the x-intercept of the line with the equation <br><br> 8x-1/3y=16
    7·2 answers
  • Refer to matrix A and identify the matrix element a31.
    15·1 answer
  • Ariel is filling a giant beach ball with air. The radius of the beach ball is 30 cm.
    10·1 answer
  • In one week, the 9th grade class recycled 9 2/3 pounds of glass and 12 3/4 pounds of newspaper. How many more pounds of newspape
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!