Michael has 1.85 in dimes and nickels.He has a total of 25 coins.how many of each does he have
1 answer:
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Answer:
Correct choice is 2.
Step-by-step explanation:
We have been given a graph of the quadratic function. Now we need to use that graph to find the equation of the graph in vertex form. By the way given choices written in intercept form so to be accurate we are going to find the equation in intercept form.
from graph we see that x-intercepts are at 5 and -2.
we know that if x=a is x-intercept then (x-a) must be factor.
So (x+2)(x-5) is the factor.
when leading coefficient is positive then graph opens upward.
so that means leading coefficient is 0.4
Hence correct choice is 2.
Answer:
Step-by-step explanation:
Split the second term (5x) into two terms. Multiply the coefficient of the first term (2) by the constant term (3):
Find which two numbers add up to 5 and multiply into 6:
Split 5x as the sum of 3x and 2x:
Now factor out a common term for the first 2 terms:
And do the same for the last 2 terms:
Re-insert:
Factor out the common term 2x+3 and insert the values in front of the parentheses (x and 1):
Separate the parentheses and equal them to 0. Solve for x:
and