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crimeas [40]
3 years ago
13

Find the value of expression the a3−3a2+5a−7 by substituting a=3.

Mathematics
1 answer:
8090 [49]3 years ago
6 0

Answer:

21 is answer

Step-by-step explanation:

Find the value of expression the a3−3a2+5a−7 by substituting a=3.

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Look at the figure and answer
andreyandreev [35.5K]

Answer:

\cos x=\dfrac{8}{f}

Step-by-step explanation:

Given that,

\tan x=\dfrac{e}{8}\\\\\sin x=\dfrac{e}{f}

We need to find the value of cos x.

We know that,

\tan\theta=\dfrac{\sin\theta}{\cos\theta}

Using the above relation,

\dfrac{e}{8}=\dfrac{\dfrac{e}{f}}{\cos x}\\\\\cos x=\dfrac{\dfrac{e}{f}}{\dfrac{e}{8}}\\\\=\dfrac{e}{f}\times \dfrac{8}{e}\\\\=\dfrac{8}{f}

So, the value of cos x is equal to \dfrac{8}{f}.

7 0
3 years ago
2x+4=16 what is the solution?
Oxana [17]

X=6 because 2*6=12 and 12+4=16

3 0
3 years ago
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Find the solution to the system<br> of equations. Y=1/2x-1 and x=4
oksano4ka [1.4K]

the point where the two lines intersect will be your answer.

from the photo, your x-coordinate will be 4, and your y-coordinate will be 1. that's where the two lines meet, so that's the solution.

the answer will be (4,1).

i hope i helped! good luck.

5 0
1 year ago
The output is one-fifth of the input
Sindrei [870]

Y=X/5

Step-by-step explanation:

Step 1:

Let X be the input and Y be the output variable

Given: the output is one-fifth of the input

Step 2:

Y=X/5 be the require function

Eq:

for X=1, Y = 1/5

    X=2, Y=2/5, etc

8 0
3 years ago
Create an equation to solve for x, then solve to find its value.
Amanda [17]

Answer:

Equation: x + 16 + 13 + x = 21 ; x = -4

Step-by-step explanation:

x + 16 + 13 + x = 21 (Given)

2x + 29 = 21 (Added like terms)

2x = -8 (Subtracted 29 on both sides)

x = -4 (Divided 2 on both sides)

8 0
3 years ago
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