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Elena-2011 [213]
3 years ago
14

12, 15. -27. What is the sum of the cards she chose?

Mathematics
1 answer:
diamong [38]3 years ago
4 0

Answer:

Add 12 with 15, we would get 27

If we add 27 with -27, then we would get 0, because if a negative and positive number are the same, then you add them, you will alway's get 0

0 is your answer

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A triangle with an area of 60 square inches has a height that is 16 less than 6 times its base.
PtichkaEL [24]

Step-by-step explanation:

the area of a triangle

baseline × height / 2

in our case

baseline × height / 2 = 60 in²

height = 6×baseline - 16

baseline × (6×baseline - 16) / 2 = 60

baseline × (3×baseline - 8) = 60

3×baseline² - 8×baseline = 60

baseline = x

3x² - 8x - 60 = 0

general solution to a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

a = 3

b = -8

c = -60

x = (8 ± sqrt(64 - 4×3×-60))/(2×3) =

= (8 ± sqrt(64 + 720))/6 = (8 ± sqrt(784))/6 =

= (8 ± 28)/6

x1 = (8 + 28)/6 = 36/6 = 6

x2 = (8 - 28)/6 = -20/6 = -10/3

x2 as a negative number is not a valid solution for a length in a geometric shape.

so, x = 6 in is our solution for the baseline.

height = 6x - 16 = 6×6 - 16 = 36 - 16 = 20 in

base = 6 in

5 0
2 years ago
What is the equation in slope-intercept form of a line that passes through the point (4, 5) and has a slope of 1/2?
Alisiya [41]

Answer:

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3 0
3 years ago
Can someone help pls
svet-max [94.6K]

Answer: y-4=0

Step-by-step explanation:

7 0
3 years ago
Let f(x)=3x .
3241004551 [841]
You are multiplying the 3x by 6 which means c is correct

6 0
3 years ago
Help!!!! It’s due tom
bogdanovich [222]
The answer should be D.

The maximum amount she can add is 7 books and no more, so the first two are wrong. It’s also allowed to be exactly seven, which is why it would be a closed circle.

Hope this helps!
8 0
3 years ago
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