Answer:
1.x=10 and x=−2.
2. the answer is x=7,-1
3.=3, =1
Step-by-step explanation:
1.Since it is a quadratic equation, then it has, at the most, two solutions because the square root of the variable has a positive and negative value. Thus, the solutions to the given equation are x=10 and x=−2.
2.Once in standard form, identify a, b, and c from the original equation and plug them into the quadratic formula. the you would simplify the equation.and the last thing that is to separate the equation.
3.-(-4)+/-sqrt(-4)^2-4^1^3/2*1,x=4+/-sqrt(-4)^2-4*1*3,x=4+/3sqrt16-4*1*3,x=4+/-sqrt16-12,/2*1,x=4+/-sqrt4/2*1,x=4+/-2/2*1,x=4+/2/2,x=4+2/2,x=4-2/2
Answer:
x=1 , y= 2
Step-by-step explanation:
solving for x:
2x=3(3-x) - 4
- multiply 3 by everything in the parentheses
2x= 9-3x-4
- add 3x to both sides
5x=9-4
5x=5
- divide each side by 5( isolating x)
x=1
solving for y:
y= 3- (1)
- input our solved value for x in the orginal equation
y=2
Answer:
A = 200.96 units^2
Step-by-step explanation:
We know the circumference is given by
C = 2 * pi *r
Approximating pi by 3.14
50.24 = 2 * 3.14 *r
50.24 = 6.28 r
Divide each side by 6.28
50.24/ 6.28 = 6.28r/6.28
8 =r
Now we can find the area
A = pi * r^2
A = 3.14 * r^2
A = 3.14 (8)^2
A = 200.96 units^2
Answer:
I hope that the answer I give you is correct. Doing my best to help.
Step-by-step explanation:
Assuming this is simple interest (non-compounding), if the woman invests $20000 at 9%/year, she will earn
i = prt
i=20000 * .09 * 1
i=1800
so for the woman to supplement that $1800 to $5000, she will need to get a return of $3200 in her second investment invest at 7%/year.
i = prt
3200 = p * .07 * 1
3200/.07 = p
45714.28 = p
I hope this is correct, or at least sends you on the way to the correct answer.
Answer:
A or 19/5
Step-by-step explanation:
To solve first we isolate are variables so we distubte to get -2y-2+21=3y then we add 2y to the opposite side to get -2+21=5y. Then we add -2+21 to get 19 so are equation is 19=5y. Next we just divide 19 by 5 to get y=(19/5) or option A
