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ladessa [460]
3 years ago
5

I don’t know the answer or how to do this, help!

Mathematics
1 answer:
makvit [3.9K]3 years ago
6 0

Answer:

B.

Step-by-step explanation:

y = x^2 - x - 12

y = (x-4)×(x+3) that means x it either 4 or -3

y = x + 3

for x = 4 ➡ y = 3+4 ➡7

for x = -3 ➡ y = -3 + 3➡0

(the answer key is most probably faulty there's no way for y to be 0 in both scenarios)

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Use the information in the diagram to determine the height of the tree to the nearest foot.
Illusion [34]
The answer is 80 ft. 

Based on the diagram we know that the tree triangle and the building triangle are similar triangles where the lengths of each are proportional to the other. 

The lengths of the triangle the tree makes are half of the lengths of the building triangle. So this problem can be solved using ratio and proportion:

\frac{144}{160} =  \frac{72}{x}

to solve for x, all you need to do is cross multiply then divide. 

\frac{160*72}{144} =x

The answer is then 80ft.

Another way to solve this is just by using logic. If the lengths of the tree triangle is half of the building, simply divide the lengths of the building triangle by two. 

160ft/2 = 80ft. 

8 0
3 years ago
34 + 2.5 =<br>(Input only whole numbers.)​
Viefleur [7K]

Answer:

91

Step-by-step explanation:

Use PEMDAS:

Exponents and multiplying before adding.

3^4+2*5\\\rightarrow 3^4=81\\81+2*5\\\rightarrow 2*5=10\\81 + 10 =91

3 0
3 years ago
Read 2 more answers
What is the solution to this rational equation? 24/x-8=4
Annette [7]

Answer:

<h2>X = 14 </h2>

24/x-8 = 4

Multiplying both the sides with x-8

24 = (x-8)*4

24 = 4x - 32

24 + 32 = 4x

56 = 4x

56/4 = X

14= X

4 0
2 years ago
Can i please get help on this question?
Kamila [148]

The answer would be 3.

In order to find this you must place the values in where you see the letters. So start with the letters and plug in.

mx - y

Since m = 1, put that in.

(1)x - y

Since x = 5, put that in

(1)(5) - y

Since y = 2, put that in

(1)(5) - (2)

Now follow the order of operations and solve

(1)(5) - 2

5 - 2

3

5 0
3 years ago
Read 2 more answers
A rectangular piece of metal is 20 in longer than it is wide Squares with sides 4 in long are cut from the four comers and the f
vlada-n [284]

Answer:

14 \frac{5}{48}

Step-by-step explanation:

rectangular volume = length * height * width

1354 = (20+4) * 4 * width

1354 = 24 * 4 *w

1354 = 96w

14.1 = w

7 0
4 years ago
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