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
Inessa05 [86]
3 years ago
6

4. Multiply or divide : i) (a+b) (a-b) ii) (4b +5a) ÷ 2 b​

Mathematics
1 answer:
IgorC [24]3 years ago
4 0

Answer:

1. a²-b²

2.4b² + 5ab/2

Step-by-step explanation:

1:. it's a formula of a²-b² so, it can be solved like this and

2: I'm not sure about 2nd one

You might be interested in
Explain why 17 tens and 107 tens have the same value
olga nikolaevna [1]
They do not have the same value because 17 times 10 is 170 because all u need to do is add a zero at the end
5 0
3 years ago
Angle CAB=90<br> AB=AC=DE<br> BD=9<br> CE=8<br> Find DE
zalisa [80]

Answer:

  29

Step-by-step explanation:

Let x represent the length of DE. Then ...

  AB = x

  AD = AB -BD = x - 9

__

  AC = x

  AE = AC -CE = x - 8

And the Pythagorean theorem applied to triangle ADE tells us ...

  x^2 = (x -9)^2 +(x -8)^2

  0 = x^2 -34x +145 = (x -5)(x -29)

Solutions are the values of x that make a factor zero: 5 or 29.

The length of DE must be greater than 9, so the appropriate solution from the above equation is x = 29.

The length of DE is 29.

3 0
3 years ago
Find a8 of the sequence 10,9.75,9.5,9.25,
borishaifa [10]

Answer:

7.25

Step-by-step explanation:

10,9.75,9.5,9.25,

the rest of the sequence would look like

8, 7.75, 7.5, 7.25, 7, 6.75, 6.5, 6.25, 6 etc.

(the pattern is - .25 from the previous number.

so the 8th number in this sequence is 7.25

hope this helps!!:)

6 0
3 years ago
Read 2 more answers
Sydney’s teacher says she may have her report card percentage based on either the mean or the median and she can drop one test s
Yuri [45]

Answer:

I'm jus gonna guess 94 if right brainliest plzzz

4 0
3 years ago
Read 2 more answers
Find the measure of angle A.<br> A<br> 7x-1<br> 12x<br> 489
Degger [83]

Answer:

48 degrees

Step-by-step explanation:

7X-1+12x+48=180

19x+47=180

19x=133

x=7

7(7)-1=A

49-1=A

48=A

A is 48 degrees

7 0
3 years ago
Other questions:
  • a graph showing inequalities “greater than or equal to” or less than equal to” will use dotted lines. true or false
    10·1 answer
  • The length of L of a rectangle is 7 ft shorter than 3 times its width W. find the perimeter of the rectangle in terms of its wid
    9·1 answer
  • What is the equation of the line x - 3 y equals 18 in slope intercept form
    10·1 answer
  • Percy works two part-time jobs to help pay for college classes. On Monday, he works 3 hours at the library and 2 hours at the co
    15·1 answer
  • What kind of transformation is illustrated in this figure?
    11·1 answer
  • A worker is installing blue and white square tiles in a kitchen. Blue tiles have different lengths than white tiles. A row of 8
    13·1 answer
  • What is 9x-2?????????????
    8·1 answer
  • Rite the phrase as an expression. Then evaluate when y=20. 3 less than the quotient of a number y and 4 Expression: When y=20, t
    7·2 answers
  • the ratio of number boys to the number of girls in a choir is 7 to 5 there are 150 girls in the choir how many boys are in the c
    7·2 answers
  • Tom bought a computer for 15% off from the list price of p dollars. if the sales tax was 8%, how much did he pay for the compute
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!