Step-by-step explanation:
Using FOIL,
(2 + √3)(1 + √3)
= (2)(1) + (2)(√3) + (√3)(1) + (√3)(√3)
= 2 + 2√3 + √3 + 3
= 5 + 3√3.
1. The answer is $24
32x0.25= 8 32-8=24
2. The answer is $105
150x0.30=45 150-45=105
3. The answer is $52
80x0.35=28 80-28= 105
4. The answer is $59.25
14+25+40=79 79x0.25=19.75 79-19.75=59.25
Answer:
10$ bill
Step-by-step explanation:
2 20$ is 40 + 5(3) = 55+4 = 59$ then 69-59=10$
Answer:
100 and 80
Step-by-step explanation:
Let x = be the first angle
x-20 is the second angle
They are supplementary so they add to 180
x+x-20 = 180
Combine like terms
2x-20 =180
2x-20+20 =180+20
2x= 200
Divide by 2
2x/2 = 200/2
x= 100
The first angle is 100 and the second is x-20
x-20 = 100-20=80
The two angles are 100 and 80
16x^2 -1 = 0
16x^2 = 1
x^2 = 1/16
x= 1/4
