Answer:
Step-by-step explanation:
10y2 - 17y + 12 = y + 16
10y2 - 17y + 12 - 16 = y
10y2 - 17y - 4 = y
10y2 -17y - y -4 = 0
10y2 -16y - 4 = 0
Now put formula
x = -b +- (square root) b2 - 4ac
2a
a = 10 b= -16 c= -4
y = -(-16) +- (square root) -16 - 4 (10) (-4)
2(10)
y = 16 +- (square root) -16 - 400
20
y = 16 +- (square root) -416
20
y = 16 +- 20.396
20
Now this +- is the plus minus thingy in which two answers come
The first we will do is +
16 + 20.396 16 - 20.396
20 20
= 1.8198 = -0.2198
The amount of paint required to paint the whole cupboard is:
https://tex.z-dn.net/?f=2%5Ctimes2.5%5E2%2B4%5Ctimes%282.5%5Ctimes3.5%29%0A%5C%5C%3D47.5+++ft%5E2
The amount of paint required to paint all but the bottom surface is:
https://tex.z-dn.net/?f=2.5%5E2+%2B+4%282.5%5Ctimes3.5%29%0A%5C%5C%3D+41.25+ft%5E2
So the difference in paint required is 6.25 square feet worth of paint.
Answer:
x = -2
x = -9
Step-by-step explanation:
The linear system is:
8x - 4y = 20 ⇒ (1)
5x - 8y = 62 ⇒ (2)
To solve the system multiply equation (1) by -2 to make the coefficients of y equal in values and different in signs, then add the resulting equation with equation (2)
∵ -2(8x) + -2(-4y) = -2(20)
∴ -16x + 8y = -40 ⇒ (3)
- Add equation (2) and (3)
∴ -11x = 22
- Divide both sides by -11
∴ x = -2
Substitute the value of x in equation (1) or (2)
∵ 8(-2) - 4y = 20
∴ -16 - 4y = 20
- Add 16 to both sides
∴ - 4y = 36
- Divide both sides by -4
∴ y = -9
C. 1/5. Because there is only one answer that is the right answer to each multiple choice. Also, there are 5 choices for us to choose.
Your answer will be 1 since both the numerator can be divided by the denominator and equal 1, in other words, the numerator can fit into the denominator once. Also, if you multiply the denominator by 1, you will get the numerator.