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Ray Of Light [21]
3 years ago
13

Factorise 49x²-y² class 8​

Mathematics
2 answers:
kondor19780726 [428]3 years ago
8 0

Answer:

(7x-y)(7x+y)

Step-by-step explanation:

Charra [1.4K]3 years ago
6 0

Answer:

(7x-y)×(7x+y)

Step-by-step explanation:

49x²-y²

7²x²-y²

(7x²)-y²

(7x-y)×(7x+y)

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The number a exceeds the number b by 50 percent. By what percent is the number b smaller than the number a?
inna [77]

Answer:

   33 1/3 percent smaller

Step-by-step explanation:


The number a exceeds the number b by 50 percent.

a = b + b*.5

a = b(1.5)

Divide by 1.5

a/1.5 = b

2/3a =b



We want to find (a-b)/a  to find the percent decrease

                           (a-2/3a)/a *100percent

                             (1/3a)/a* 100 percent

                                  1/3 * 100 percent

                                     33 1/3 percent smaller

5 0
3 years ago
Scientific notation <br> 0.000003408 =
o-na [289]

Answer:

3.408 × 10-6 i think

Step-by-step explanation:

6 0
3 years ago
Malik's solution to the equation 2/5x-4y=10 when x=60 is shown below​
Hatshy [7]

Answer:

D. Malik substituted 60 for y instead of x.

Step-by-step explanation:

3 0
3 years ago
The scale on a map of Roswell, New Mexico is 1 inch : 0.5 mile. If two buildings in Roswell are 2.3 miles apart in real life, th
Nataly_w [17]

Im not too sure but I think its 4.6,because 1 in :.5 mile. As a whole, .5 can go into 2, 4 times, then whats left over also gets divided into .6. Add those together and youll get 4.6

4 0
3 years ago
The Taieri Plain in New Zealand is 6 feet below sea level (or –6 feet). If you are standing 3 feet above sea level, is your elev
andrew-mc [135]

Answer:

NO

Step-by-step explanation:

Opposite numbers are the same distance from 0 on the number line, but in opposite directions. Steps I would follow:

first, check the directions to make sure they are opposite,

then read the digits, or count the tick marks or compare lengths with dividers or ruler or marks on a piece of paper to see if the distances are the same.

3 is not the opposite of -6

Therefore 6 is the opposite of -6

3 0
3 years ago
Read 2 more answers
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