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
finlep [7]
2 years ago
7

Mac has taken seven maths exams this year. His average mark is 78%. What mark must he get on the eighth exam to raise his averag

e to 80%?
Mathematics
1 answer:
mash [69]2 years ago
4 0

Answer:

94

Step-by-step explanation:

7*78 + x = 8*80

x = 94

Or, think that he was short 2 points on each of 7 tests, so he has to make them all (14) up on the last test.

You might be interested in
Evaluate. 72 - 3 + 9 × 8 ÷ 2 w = a0
coldgirl [10]
Multiply to remove the variable from the denominator. w=-9/17
7 0
3 years ago
Read 2 more answers
PLEASE PLEASE HELP
padilas [110]

Answer:

(Y × 10) + X = 30

hope it helps

Step-by-step explanation:

Y = Cost of each ticket

X = cost of entry fee

so he bought 10 tickets

so you multiply cost of each ticket ( y ) by 10

then you add the entry fee ( x ) to find the total cost ( $30 )

6 0
3 years ago
What does this equal?<br><br> 6(x+1)+5=13-2+6x
natta225 [31]
<span>Simplifying 6(x + 1) + 5 = 13 + -2 + 6x Reorder the terms: 6(1 + x) + 5 = 13 + -2 + 6x (1 * 6 + x * 6) + 5 = 13 + -2 + 6x (6 + 6x) + 5 = 13 + -2 + 6x Reorder the terms: 6 + 5 + 6x = 13 + -2 + 6x Combine like terms: 6 + 5 = 11 11 + 6x = 13 + -2 + 6x Combine like terms: 13 + -2 = 11 11 + 6x = 11 + 6x Add '-11' to each side of the equation. 11 + -11 + 6x = 11 + -11 + 6x Combine like terms: 11 + -11 = 0 0 + 6x = 11 + -11 + 6x 6x = 11 + -11 + 6x Combine like terms: 11 + -11 = 0 6x = 0 + 6x 6x = 6x Add '-6x' to each side of the equation. 6x + -6x = 6x + -6x Combine like terms: 6x + -6x = 0 0 = 6x + -6x Combine like terms: 6x + -6x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.</span>
7 0
4 years ago
Someone help me answer this
denis23 [38]
65 yards because of a2+b2=c2
7 0
3 years ago
Read 2 more answers
2m ∙ 2n would be the same as _____.
Darina [25.2K]

Answer:

4nm

Step-by-step explanation:

Multiply the coefficients, hook up the variables together.

I am joyous to assist you anytime.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Quadrilateral A’B’C’D’ is a dilation of quadrilateral ABCD about point P. Quadrilateral ABCD is shown. Side AB is labeled 5. Sid
    13·2 answers
  • There are 180 pages in the book Diana is reading. Diana has read 90 pages. What percent of the book has she read?
    15·2 answers
  • Assume that each bag contains 5 balls. Bag a contains 2 red and 3 white, while bag b contains 1 red, 1 white, and 3 blue. You ra
    6·1 answer
  • The seats in each section are in 32 rows.There is an equal number of seats in each row.How many seats are in each row?
    14·1 answer
  • Find the slope of the line passing through the points (3,9) and 12,-5)​
    7·1 answer
  • Solve the equation.<br><br> 5^3x-1 = 5^5<br><br> x=?
    9·2 answers
  • How much water should be added to 12mL of ​7% alcohol solution to reduce the concentration to ​6%?
    10·2 answers
  • If a marble is randomly chosen from a bag that contains exactly 8 red marbles, 6 blue marbles, and 6 white marbles. What is the
    15·1 answer
  • I Need Help with this ​
    9·1 answer
  • Luke made cookies he used 1/2 of a cup of flour and 2/5 of cup of sugar. How much more flour than sugar did Luke use
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!