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
const2013 [10]
2 years ago
14

If a+b=5 and a-b=4 then b^2-a^2 =

Mathematics
1 answer:
Anna007 [38]2 years ago
5 0

Answer:

a + b = 5 \\ a \:  = 5 - b \\  a - b = 4 \\ 5 - b - b = 4 \\ 5 - 2b = 4 \\ 5 - 4 = 2b \\ 1 = 2b \\  \frac{1}{2}  =  \frac{2b}{2}  \\0.5 = b \\  b = 0.5 \\ a = 5 - b \\  = 5 - 0.5 \\  = 4.5 \\  {a \: }^{2}  -  {b}^{2}  = ( {4.5}^{2})  - (  {0.5}^{2} )  \\  = 20.25 - 0.25 \\  = 20 \\  {a}^{2}  -  {b}^{2}  = 20

Step-by-step explanation:

HOPE THAT THIS IS HELPFUL.

HAVE A GREAT DAY.

You might be interested in
Need reasons answer for this please!
Ugo [173]

Step-by-step explanation:

1.Given .

2.Being vertically opposite angle.

3.Because sum of all interior angle of a triangle is always 180°.

4.From the statement of 3 number.

5.Because angle 4 = angle 3 and angle 6= angle 1 .

6.(suppose ,< is angle sign) solving this equation,

m<1 + m<2+ m<3 = m<3 + m<5 + m<1

3 0
3 years ago
A number has 2 tens and 15 ones write the number in words
Lena [83]
The answer of this question is 152
6 0
3 years ago
A store purchases an item wholesale for 60$ and marks it up by 70 percent if there is a 7 percent tax on the item how much will
seropon [69]

Answer:

109.14

Step-by-step explanation:

to Start off do 60 x .70, then add the answer to 60, then multiply by .07 then add that to 102, for the answer of 109.14

6 0
3 years ago
If Nancy uses 1 74 tablespoons of coffee to make 10 cups of coffee, how
Anna [14]

Answer:

if you mean 17/4 tablespoons then it would take .425 tablespoons to make one cup of coffee, because 17/4 is 4.25 as a decimal.

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Help please I don’t get it
AlexFokin [52]

Answer:

3/8

Step-by-step explanation:

Rearrange, find common denominator.

x =  \frac{7}{8}  -  \frac{1}{2}  \\ x =  \frac{7}{8}  -  \frac{4}{8}  \\ x =  \frac{3}{8}

8 0
2 years ago
Read 2 more answers
Other questions:
  • What is 18/12 in simplest form?
    6·1 answer
  • PLEASE HELP ASAP <br> solve for y. ln(2y-1)=3
    8·2 answers
  • If the length of an arc intercepted by a central angle of 1.25 radians is 32 inches, which proportion could be used to find the
    13·1 answer
  • The greatest common factor of 42 &amp; 15
    9·1 answer
  • In the figure shown, line AB is parallel to line CD. Part A: What is the measure of angle x? Show your work. (5 points) Part B:
    10·2 answers
  • When you cut a pyramid straight up and down, what shape is your cross section?
    9·2 answers
  • Please help me I don't knoe
    12·2 answers
  • Please tell me what the value of x would be (it has to be a fraction)
    5·1 answer
  • A ride in a taxi costs a flat rate of $4.25 and $1.75 per mile.
    9·1 answer
  • Convert the angle - 3 radians to degrees, rounding to the nearest 10th.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!