2b^2+9
when b=3
First we have to replace b by the number giving
2(3^2)+9
(2)(9)+9
18+9
= 27
I hope that's help !
Answer:
1) x > -12
Step-by-step explanation:
first, subtract 7 from each side of the inequality to get:
-2/3x < 8
multiply each side by the reciprocal of -2/3 which is -3/2 to get:
x > -24/2
notice the symbol has been reversed because that is the rule whenever you multiply or divide an equality be a negative value
simplified, answer is x > -12
X^2-2x -3 =0
a =1 b =-2 and c = -3
x = - (-2) +/- sqrt (-2)^2 - 4(1)(-3)
--------------------------------------
2(1)
x = + 2 +/- sqrt [(4) - 4(-3)]
-------------------------------
2
x = +2 +/- sqrt [4 + 12]
--------------------------
2
x = +2 +/- sqrt[16]
-------------------
2
x = +2 +/- (4)
-------------
2
x = 2 + 4 or 2 -4
------- ------
2 2
x = 6/2 or -2/2
x = 3 or x = -1
Answer:
Shaded = 12 cm^2 Unshaded = 1.96 cm^2
Step-by-step explanation:
<u>This is really an </u><u>impossibly</u><u> out- of- scale drawing :</u>
<u> (assuming if it </u><u>LOOKS</u><u> like a right angle it </u><u>IS</u><u> a right angle ) </u>
Other side of large <u>rectangle</u> (via pythagorean theorem):
= sqrt (8^2 - 5^2) = sqrt 39
Large <u>rectangle</u> area = 5 x sqrt39 = 13.96 cm^2
Small shaded rectangle = 4 x 3 = 12 cm^2
UNshaded area = large area - shaded area = 13.96 - 12 cm^2 = 1.96 cm^2