Answer:
Step-by-step explanation:
since the cross multiples are equal, you find a product and use the inverse operation as you would in an equation
Example 4 is to 36 as 3 is to X: 4/36 = 3/X --> 4*X = 3*36. Divide both sides by 4, to solve for X = 27.
is over of = percent of 100
is/of=%/100
What is 10% of 40.
is = x
x/40 = 10/100
cross mulitply 40*10= 400/100=4 x=4
0
1
2
Answer:
-3, 5/2
Step-by-step explanation:
What are the roots of the function y = 4x2 + 2x – 30?
To find the roots of the function, set y = 0. The equation is 0 = 4x2 + 2x – 30.
Factor out the GCF of : 2, so the equation becomes 0 = 2(2x2+x-15)
Next, factor the trinomial completely. The equation becomes: 0=2(x+3)(2x-5)
Use the zero product property and set each factor equal to zero and solve.
x+3=0 2x-5 = 0
x = -3, 5/2
The roots of the function are -3, 5/2.
Hope this helped!
#3 is 11, #10 is 5, # 7 is 3
So, start with the growth formula
A=P(1+r)^t then plug in the values
6200=5200(1+.038)^t
then divide both sides by 5200
1.1923076923=1.038^t
then take the log of both sides
log(1.1923076923)= t log(1.038)
then divide both sides by the log(1.038)
4.7161004299=t
then round it to the nearest whole number
5=t
so about 5 months