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
skelet666 [1.2K]
3 years ago
7

I need help with these two equations and to explain how to do it

Mathematics
1 answer:
jekas [21]3 years ago
8 0

Answer:

27)  (7 + 9) · 3 / 6 = 48/6 = 8

28) (-7)² - 3(-7)(4) = 49 - (-84) = 133

Step-by-step explanation:

You might be interested in
The edges of a rectangle solid have lengths 2x,3xand 5x.what is the total surface area of the solid ?
Greeley [361]

Answer:

30x³

Step-by-step explanation:

2x×3x=6x²

6x²×5x=30x³

8 0
3 years ago
What is the least common denominator of the fraction 3 x over x plus 1 plus the fraction x plus 1 over 2 x plus the fraction 5 o
Hoochie [10]
3x/(x+1) + (x+1)/(2x) + (5/x)

To find the least common denominator, we multiply the denominators that cannot factor into eachother. x, the denominator in 5/x, fits into 2x, so we do not need to multiply this number.
Therefore, the least common denominator is:
2x(x+1) 

The first term will be multiplied by 2x/2x
The second term will be multiplied by (x+1)/(x+1)
The third term will be multiplied by 2(x+1)
3 0
3 years ago
There were 16 sandwiches on a tray for a lunch meeting. After the meeting, 3 were left. How many sandwiches were eaten?
kifflom [539]

Answer:

13

Step-by-step explanation:

16-3+= 13

6 0
3 years ago
Evaluate -5 to the power of 2​
xeze [42]

Answer:

the answer is -25

Step-by-step explanation:

-5 x -5= -25

negative x negative= negative

5 0
3 years ago
Read 2 more answers
Solve the system by graphing <br> y = -3/4x + 6 <br> y = 2x - 5
jonny [76]

Answer:

X= 4. Y = 3.

Step-by-step explanation:

If you have a graphing calculator, put the first equation into Y1. And second equation into Y2. Then, find the intersection of the two equations. That's how you find your answer.

4 0
3 years ago
Other questions:
  • How do you use standard deviation?
    7·2 answers
  • On the way home from school, ross wears his 20-pound backpack and carries his 7-ounce lunchbox. how many ounces does he carry in
    12·2 answers
  • Describe the correlations from left to right ? Plz explain I can’t get this wrong &amp; I really need help !
    8·1 answer
  • Two construction workers, Tyrone and Diego, are standing 15 yards apart, looking up at a piano hanging between the two men from
    13·1 answer
  • Which table represents a linear function?
    14·1 answer
  • Minus 2p subtract 4 equals 2
    13·2 answers
  • Q = d / d+ n on a manufacturer's assembly line, d parts are found to be defective and n parts are nondefective. the formula abov
    7·1 answer
  • Anyone good at pre algebra?
    6·1 answer
  • Your friend is hitting a golf ball. The picture shows a line from your friend to the hole, and also a line to a tree and a line
    8·1 answer
  • Use the low of Cosines to solve the given triangle. Round your answer to two decimal places. a = 51, b = 21, c = 68
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!