1340 units²
There are 2 rectangles 25 × 12, 2 rectangles 25 × 10 and 2 rectangles 12 × 10
SA = 2(25 × 12) + 2(25 × 10) +2(12 × 10)
= 600 + 500 + 240 = 1340 units²
49w² -112w + 64
first, you have to find 2 numbers that add up to equal -112, but also multiply together to get a product of 3136 (49 * 64)
two numbers that add to -112 and multiply to equal 3136 is -56 and -56
we can add them into the equation by putting them in for -112x
49w²-56w-56w+64
we now look at what the first 2 numbers have in common and what the last two numbers have in common
49w² and -56w both have w and 7 in common so we can divide 7w
7w(7w -8)
-56w and 64 both have -8 in common so we can divide by -8
-8(7w-8)
now we take the 2 numbers on the outside and bring down the numbers in the brackets
(7w-8)(7w-8)
(7w-8)²
Rewrite x+y = 24 as x = 24-y
Replace x in the 2nd equation with the rewritten equation:
3(24-y) + 5y = 100
Distribute the 3:
72-3y +5y = 100
Combine like terms:
72 +2y = 100
Subtract 72 from each side:
2y = 28
Divide both sides by 2:
y = 14
To fid X replace y with 24 in the first equation:
x + 14 = 24
X = 10
There are 10 3 point questions and 14 5 point questions.
Sinuar and radius of 16 are true