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3 years ago

Factor 4a2 - 25. A. (2a + 5)(2a + 5) B. (2a - 5)(2a - 5) C. (2a - 5)(2a + 5)

1 answer:

3 0

This is the diference of 2 perfect squares. 4 is a perfect square, x^2 is a perfect square, and 25 is a perfect square. The pattern for this is (ax + b)(ax - b). Our a is 2 since 2*2 = 4, and our b is 5 since 5*5 = 25. So your factors are (2a+5)(2a-5), choice C.

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Solve,justify and check: 3(7+5n)=6n+6(1+4n)

vlabodo [156]

Answer:

1=n

Step-by-step explanation:

Step 1- Distribute into the parenthesis.

7(3)+5(3)n= 6n+1(6)+4(6)n

Step 2- Multiply

21+15n= 6n+6+24n

Step 3- Add common variables to simplify.

21+15n= (24n+6n)+6

21+15n= 30n+6

Step 4- Subtract the smallest variable to both sides.

21+15n= 30n+6

-15n -15n

21= 15n+6

Step 5- Subtract 6 to both sides.

21= 15n+6

-6 -6

15= 15n

Step 6- Divide both sides by 15.

15= 15n

15 15

1=n

4 0

3 years ago

Read 2 more answers

Solve the following equation for m. F=mv^2 / r

aleksklad [387]

Answer:

Step-by-step explanation:

F = $\frac{mv^2}{r}$

mv² = Fr

m = $\frac{Fr}{v^2}$

8 0

1 year ago

Esteban finds 12 baseball cards on Monday and 24 more baseball cards on Tuesday he gives some baseball cards to his sister and n

sdas [7]

Answer:

Number of cards given to sister = 35 card

Step-by-step explanation:

Find baseball card on Monday = 12

Find baseball card on Tuesday = 12 + 24 = 36

Remain baseball card = 13

Find:

Number of cards given to sister

Computation:

Number of cards given to sister = Find baseball card on Monday + Find baseball card on Tuesday - Remain baseball card

Number of cards given to sister = 12 + 36 - 13

Number of cards given to sister = 35 card

5 0

2 years ago

What is the surface area of a right rectangular prism with the length of 10 inches width of 8 inches and a height of 1.5 inchess

Contact [7]

Answer: Option 3

Step-by-step explanation: Option (3) is correct.The surface area of a rectangular prism of given dimension is 170 square inches.Step-by-step explanation:Given : a rectangular prism whose base is 5 inches by 6 inches and whose height is 5 inches.We have to find the surface area of a rectangular prism of given dimension.Since a rectangular prism whose base is 5 inches by 6 inchesThat is length (l)= 5 inches Width (w) = 6 inches and height (h) = 5 inches.Also . Substitute, we have,simplify , we have,surface area of a rectangular prism = 170 inches²Thus, the surface area of a rectangular prism of given dimension is 170 square inches

8 0

3 years ago

This Is my question

grigory [225]

Answer:

i think its 2 as in square 2

5 0

3 years ago