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Andrew [12]
3 years ago
7

Add or substract the linear expression.

Mathematics
1 answer:
STatiana [176]3 years ago
4 0

Answer:

-7x - 6

Step-by-step explanation:

1

Distribute

(−2+5)−1(6+4)+(−7)

(−2+5)−6−4+(−7)

2

Eliminate redundant parentheses

(−2+5)−6−4+(−7)

−2+5−6−4+−7

3

Add the numbers

−2+5−6−4+−7

−2−6−6+

4

Combine like terms

−2−6−6+

Answer:

−7−6

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Find the area please
tatuchka [14]

Answer:

D

Step-by-step explanation:

Recall that the area of a triangle is given by:

\displaystyle A = \frac{1}{2} bh

In this case, the base is <em>x</em> and the height is <em>y</em>. Hence:

\displaystyle A = \frac{1}{2} xy

We can write the following ratios:

\displaystyle \sin \alpha = \frac{x}{12} \text{ and } \cos \alpha = \frac{y}{12}

Solve for <em>x</em> and <em>y</em>:

\displaystyle x = 12\sin \alpha \text{ and } y = 12\cos \alpha

Substitute:

\displaystyle A = \frac{1}{2}\left(12\sin \alpha\right)\left(12\cos \alpha\right)

And simplify. Hence:

\displaystyle A = 72\sin \alpha \cos\alpha

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6 0
3 years ago
Write the equation of the linear relationship with a slope of -1/2 that goes though the point (-2,1).
finlep [7]
Y=mx+b
Find the y-intercept (-2,1)
1=-1\2(-2)+b
1=2\2+b
1=1+b
-1+1=b
0=b
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3 0
3 years ago
A set of pulleys is used to lift a piano with a mass of 102 kg. The piano is lifted 3 meters in 1 minutes. How much power is use
agasfer [191]

Answer:

50.031 watts

Step-by-step explanation:

Formula

Power = Force * distance / time

The units are critical

distance = meters

time = seconds

force = newtons = kg * m / s^2

Solution

F = m * a

a = 9.81

m = 102 kg

F = 102 * 9.81 = 1000.62 Newtons

T =  minute = 60 sec/min * 1 min

T = 60 seconds

d = 3 meters

Power = 1000.62 * 3 / 60

Power = 50.031

3 0
3 years ago
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Https://www.dropbox.com/s/vnurvg2iqim6xnd/Screenshot%202016-10-18%2008.25.52.png?dl=0
5 0
4 years ago
Jerry bought a rectangular kitchen table. The table is 1.6 meters wide and 2.3 meters long. What is the area of the top of the t
Tanya [424]
=(1.6)(2.3)
=3.68 meters
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3 years ago
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