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telo118 [61]
2 years ago
10

(m-n)*2 -18(m-n) +77​

Mathematics
1 answer:
nikdorinn [45]2 years ago
6 0

Answer:

-16m + 16n + 77

Step-by-step explanation:

2(m - n) - 18(m - n) + 77

We can let x = (m - n) to make our job easier.

2x - 18x + 77

Now, we can conclude that this expression is equal to -16x + 77.

We can substitute x = (m - n) back into the expression:

-16(m - n) + 77

Distribute:

-16m + 16n + 77

And you're done!

Please mark as brainliest! :

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(15) ? Is this correct or am I missing something, thanks :)
svetoff [14.1K]
You are correct!

Step 1:Write what you know
Madeline's Height: 6 ftMadeline's Shadow: 108 in
Friend's Height: X (we use X as a variable because his height is unknown)Friend's Shadow: 108 in - 1.5 ft                              108 in - 18 in                                 90 in
Step 2:Set up proportions
6          x----- = -----108      90 
Step 3:Cross Multiply & Solve
108x = 540x = 5 ft tall

4 0
2 years ago
Given the formula A = P(1 + )". compute A (rounded to two decimal places) if P = 10,000,7
Flura [38]

Answer:

A = 16010.32

Step-by-step explanation:

Given that,

A=P(1+\dfrac{r}{k})^n

Put P = 10,000, r = 0.08, k = 2 and n = 12 in the above formula to find A.

A=10,000(1+\dfrac{0.08}{2})^{12}\\\\=10,000\times (1.04)^{12}\\\\=16,010.32

So, the value of A is 16010.32. Hence, the correct option is (B).

4 0
2 years ago
The vertices of a parallelogram are at (-9, 12), (-3, 12), (-5, 10), and (–11, 10). What is the perimeter of the parallelogram?
eduard

let point A has coordinates (-9;12),B(-3;12),C(-5;10) and D(-11;10).Then the vector AB={6;0}, BC={2;-2}, CD={6;0}, AD={2;-2} and their and the length of the vectors

|AB| = |CD| = \sqrt{ {6}^{2} + {0}^{2} } = \sqrt{36} = 6 \\ |BC| = |AD| = \sqrt{ {2}^{2} + {( - 2)}^{2} } = \sqrt{8}

p = 6 + 6 + \sqrt{8} + \sqrt{8} = \\ = 12 + 2 \sqrt{8} = 17.66\approx18

7 0
3 years ago
Oscar drew the image of a
trasher [3.6K]

Answer:

When we have a point (x, y) and we do a reflection over a given line, we know that the new point (x', y') will be at the same distance from the line as our initial point (x,y).

Now, in this case, we have a reflection over the line y = -1. (this line is parallel to the x-axis)

But in the image, we can see that the reflected triangle is drawn in the other side of the y-axis, this means that the reflection was made in a line parallel to the y-axis.

Then the mistake that Oscar did is that he reflected over the wrong line, seems that he reflected the triangle over the line x = -1 instead of the line y = -1.

7 0
3 years ago
Which set of a side lengths can be used to form a right angle?
Rashid [163]

Answer:

Any of the Pythagorean Triples

Step-by-step explanation:

4 0
3 years ago
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