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
ioda
3 years ago
10

John knows that his first 4 test grades were 84,79,82,88. Find John’s grade on the fifth test if his average was 83.8

Mathematics
1 answer:
Debora [2.8K]3 years ago
5 0

Answer: The fifth grade is 86

Step-by-step explanation:

Given that there are five grades, let the missing fifth grade be represented by x:

84 +79 +82 +88 + x /5 = 83.8

333 + x/5 = 83.8

Next, we cross multiply:

333 + x = 83.8 x 5

333 + x = 419

Subtract 333 from both sides of the equation to get the value of x

333 + x - 333 = 419 - 333

x = 86

You might be interested in
3 What is the y-intercept of the line perpendicular to the line y = -3/4x + 5 that includes the point (-3, –3)?
Mnenie [13.5K]

Answer:

y=4/3x-5

this is because perpendicular lines makes the slope the exact opposite. everything else stays the same

6 0
3 years ago
PLEASE HELP ASAP! WILL GIVE BRAINLIEST! I don’t really understand how to do this?
galben [10]

so we're trying to figure what portion of silas' slime is detergent. we know that his slime is a combo of 5 oz glue and 2 oz detergent for a total of 7 oz of slime.

what we want to find is how much of those 7 oz of slime is detergent.

quite simply 2 oz of the 7 is detergent.

to make that into a percent just divide 2 by 7.

2/7 = 0.2857

then move the decimal over two spots to get

28.57 or

D. 28.6%

just remember that percents are just how much makes up the whole.

4 0
3 years ago
Christian is 3 times as old as marie. marie is 12 years old. how old is christian
skad [1K]
Christian is 36 years old.
8 0
3 years ago
A set of data whose histogram is extremely skewed yields a sample mean and standard deviation of 69.5 and 10.75, respectively. W
frosja888 [35]
I am a beautiful person who can help you with the new one of those who are interested
3 0
3 years ago
14570.7 to 3 significant figures​
NemiM [27]

Answer:

what

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • The types of flowers shown in the table make up an arrangement. What percent of the flowers in the arrangement are roses
    11·2 answers
  • If the radius of a circle is increased by a factor of 3, how will the area of the object be affected?
    6·1 answer
  • Olive walks at a rate of 4 miles per hour she lives 2 miles from the mews station how long wil it talk her to walk home from the
    6·1 answer
  • Find the least common multiple of 5 10 and 15
    8·1 answer
  • Find the Horizontal Tangent for x^3/3+3x^2-16x+9
    7·1 answer
  • The first one asks for the value of x. I need help on both. I am struggling to understand how to do this, please help
    13·1 answer
  • HELLP MATH PLEASEEEE <br> What is the product?
    11·1 answer
  • Help asap ill mark brainliest
    11·2 answers
  • What is the area of 4.8cm
    9·1 answer
  • Which of the following could be the equation of a line perpendicular to the line 2x−5y=7?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!