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
topjm [15]
3 years ago
11

A student is asked to calculate the value of 752 − 702 using the identity x2 − y2 = (x − y)(x + y). The student's steps are show

n below.
Step 1: 752 − 702 = (75 − 70)(75 + 70)

Step 2: = (5)(155)

Step 3: = (5)(150) + 5(5)

Step 4: = 750 + 25

Step 5: = 775

The correct answer should be 725. In which step did the student make his first error?
Step 1
Step 2
Step 3
Mathematics
1 answer:
Mrrafil [7]3 years ago
7 0
Step 2, 5*155= 775,which means the steps after that would make the answer even more variable
You might be interested in
Simplify -5 to the 2nd power, + 8 |-1| + (-3).
madreJ [45]

Answer:

-19

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Solve for x. Write both solution, separated by a comma. 4x^2-x-3=0.
Step2247 [10]

Answer:

x = -3/4, 1

Step-by-step explanation:

Factor left side of the equation.

(4x + 3)(x - 1) = 0

Set factors equal to 0.

4x + 3 = 0

4x = -3

x = -3/4

x - 1 = 0

x = 1

6 0
3 years ago
Read 2 more answers
Brian runs 3 miles in 25 minutes 30 seconds, and Mary runs 4 miles in 34
Katyanochek1 [597]

Answer:

Same speed.

Step-by-step explanation:

divide Distance by speed

25.5/3=8.5mph

34/4=8.5mph

4 0
3 years ago
3y+3 (1-y)-y=-6PLEASE help
Murrr4er [49]
3y+4+3y-y=-6
6y-y+4=-6
5y+4=-6
5y=-10
y=-2
If you have any questions let me know
7 0
3 years ago
ASAP! Due tomorrow! 25 points! Read the word problem. Write an equation to represent the word problem. Solve the equation. Durin
Marrrta [24]
What you gotta take from this problem:

What Joe got during break = 2t+2

What his sister gave him = 3t

What he has total = 10 tadpoles.


Now to assemble this equation:

2t+2+3t=10

Now combine like terms to get 5t+2=10

Subtract 2 on each side of the equation to get 5t=8

Now you would divide 5 on each side and get t=1.6 , however since you can't have a .6 of a tadpole, you would have to round it up to 2.
7 0
3 years ago
Other questions:
  • Multiply the following polynomials x, (x+3) and (2x-8)
    6·1 answer
  • Beverly has a bag of marbles that weighs 30 grams. She knows that each marble weighs 1.5 grams and the bag weighs 1.5 grams. Whi
    13·1 answer
  • A 25 lb. bag Balkfoods Small Red Beans cost $52.92. What is the unit price<br> per Ib?
    7·1 answer
  • Simplify 8 over negative 4 divided by negative 3 over 9.
    10·1 answer
  • An aeroplane is 528 ft directly above an automobile and starts east at the rate of 20 miles an hour at the same instant the auto
    15·1 answer
  • Mr Loya Invested $115 in GameStop stocks. If the stocks price increased by 500% how much is Mr Loya’s investment worth now?
    13·1 answer
  • Could someone please explain how to solve for the area?
    12·2 answers
  • A 40 litres pail of paint costs $34. How much does 1 litre of paint cost?
    13·1 answer
  • Please I need help I don’t understand
    11·2 answers
  • 1/2bh for b=8 and h=11
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!