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lilavasa [31]
3 years ago
10

100 points + brainlest please help due today

Mathematics
1 answer:
Reptile [31]3 years ago
6 0

Answer:

Use the formula for direct variation

Step-by-step explanation:

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Kira is solving the equation 3(2x + 5) - (5x - 2) = 42. Her steps are shown below.
stich3 [128]

Answer:

D)2

the minus sign outside the bracket when multiplied by a negative number in the bracket is equal to a positive number

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3 years ago
How do I find square roots without a calculator?
tekilochka [14]
You have to find to numbers that are the same and multiply them to see if you the answer your looking for for example, square root of 36 is 6 because 6 time 6 is 36
6 0
3 years ago
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N
GrogVix [38]

9514 1404 393

Answer:

  (d)   f(x) = 2x^2 - 16x + 35

Step-by-step explanation:

The x-coordinate of the extreme will be found at ...

  x = -b/(2a)

where the function is f(x) = ax²+bx+c.

The extreme will be a minimum when a > 0. (eliminates choices A and B)

The x-coordinates of the extremes are ...

  C: -(-4)/(2(4)) = 1/2

  D: -(-16)/(2(2)) = 4 . . . . . matches the requirement

The appropriate choice is ...

  f(x) = 2x^2 - 16x + 35

3 0
3 years ago
A dolphin jumped up out of the water and back into the water in a parabolic path. (H) height (t) seconds . H=-8(t-0.5)^2+2 . How
tigry1 [53]

Answer:

4 seconds

Step-by-step explanation:

using the vertex formula of a quadratic,

a(x-h)^{2} + k, where (h,k) is the vertex

h = -8(t-0.5)^{2}+2    h is height and t is time in seconds

the vertex (maximum height) of the dolphin is (h,k) or (0.5, 2)  

Height of 1/2

time of 2 seconds

it will take 2 additional seconds to reach the water again.

this can also be solved using quadratic equation, but since it was already set up in vertex form, i'd use that.

4 0
3 years ago
The sum of an a.p is 340. the first term is 7 and the common difference is 6. Cal the number of terms in the sequence.
damaskus [11]

Common difference: 6

First term: 7

Second term: 13

Third term: 19

Fourth term: 25

Fifth term: 31

I hope this is correct and helps!

6 0
2 years ago
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