do the exponents: so now its [4(10) -9] + 6(4)
next do multiplication so now its (40-9) + 24
next is parenthesis 31 + 24 = 55
hope i helped :)
Answer:
c) x^2 +16x + 64 = 25
Completed question;
Monica is solving a quadratic equation. She wants to find the value of x by taking the square root of both sides of the equation. Which equation allows her to do this?
a) x^2 - 10x - 25 = 14
b)x^2 + 160x +26 = 19
c) x^2 +16x + 64 = 25
d) x^2 - 9x + 81 = 34
Step-by-step explanation:
To solve a quadratic equation by taking the square root of both sides, we should be able to express the equation in the form;
(x + a)^2 = b^2
Or
(x - a)^2 = b^2
From the above options,
Option C looks to give the desired form
x^2 + 16x + 64 = 25
Which can be further factorised as;
(x + 8)^2 = 5^2
(Note: a = 8 and b = 5)
square root of both sides;
x + 8 = +/- 5
x = +5-8 = -3 (solved)
or
x = -5-8 = -13 (solved)
There is no answer to this because:
Any digit repeating like that would usually be ?/9
Example: 0.1 repeating = 1/9
0.2 repeating = 2/9
0.8 repeating = 8/9
But 0.9 repeating? There should not be a fraction for that.
If you want to round up to 1, you can.
First of all, assuming that the "ground level" is 0;
The lift is not starting from 0, so we also need to account for the extra 15 meters above the ground the lift is.
The total distance the lift would cover in the downward direction: 15+350=365m
Now, you know that the lift covers 5 m/min
Therefore, 5x=365 (ignoring units because they can complicate things)
x=365/5
x=73 minutes
Therefore, they would take 73 minutes to reach 350 m deep into the ground with a starting position 15 m above the ground.
Hope I helped :)
Answer:
6.75
Step-by-step explanation:
hope it helps mark as brainliest
