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Troyanec [42]
3 years ago
13

If f(x)=4x+5,what is the value of f(-3)

Mathematics
2 answers:
LenaWriter [7]3 years ago
5 0

Answer:

-7

Step-by-step explanation:

f(x) = 4x + 5

write - 3 inplace of x

f(-3) = 4*-3 + 5

=-12 + 5

=-7

STatiana [176]3 years ago
4 0

Step-by-step explanation:

f(x)=4x+5

f(-3)=-12+5=-7

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P(x)=2x^5+9x^4+9x^3+3x^2+7x-6;x=i,-2
satela [25.4K]

Answer:

The value of the polynomial function at P(1) and P(-2) is 24 and 0 respectively.

Step-by-step explanation:

We are given with the following polynomial function below;

\text{P}(x) = 2x^{5} +9x^{4} +9x^{3} +3x^{2}+7x-6

Now, we have to calculate the value of P(x) at x = 1 and x = -2.

For this, we will substitute the value of x in the given polynomial and find it's value.

<u>At x = 1;</u>

\text{P}(1) = 2(1)^{5} +9(1)^{4} +9(1)^{3} +3(1)^{2}+7(1)-6

\text{P}(1) = (2\times 1) +(9\times 1)+(9 \times 1)+(3\times 1)+(7\times 1)-6

\text{P}(1) = 2 +9+9+3+7-6

P(1) = 30 - 6

P(1) = 24

<u>At x = -2;</u>

\text{P}(-2) = 2(-2)^{5} +9(-2)^{4} +9(-2)^{3} +3(-2)^{2}+7(-2)-6

\text{P}(-2) = (2\times -32) +(9\times 16)+(9 \times -8)+(3\times 4)+(7\times -2)-6

\text{P}(-2) = -64 +144-72+12-14-6

P(-2) = 156 - 156

P(-2) = 0

Hence, the value of the polynomial function at P(1) and P(-2) is 24 and 0 respectively.

3 0
3 years ago
If cos(x)=1/4 what is sin(x) and tan(x)
anygoal [31]
You can use the identity
  cos(x)² +sin(x)² = 1
to find sin(x) from cos(x) or vice versa.

  (1/4)² +sin(x)² = 1
  sin(x)² = 1 - 1/16
  sin(x) = ±(√15)/4


Then the tangent can be computed as the ratio of sine to cosine.
  tan(x) = sin(x)/cos(x) = (±(√15)/4)/(1/4)
  tan(x) = ±√15


There are two possible answers.
In the first quadrant:
  sin(x) = (√15)/4
  tan(x) = √15

In the fourth quadrant:
  sin(x) = -(√15)/4
  tan(x) = -√15
3 0
4 years ago
What is 3.1 divided by 25.42
Crank

Answer:

0.12195121951

Step-by-step explanation:

3.1 / 25.42 = 0.12195121951

4 0
3 years ago
Read 2 more answers
Which linear pair rule will not result in a congruent figure?
Rainbow [258]
Choice 4, (x,y) (2x,y) I think is the answer, because when you multiply 2 by x, you're expanding the shape
4 0
3 years ago
Solve for x. <br><br> 5 + x + (-2) = -8<br><br><br> x =
Rzqust [24]

Answer:

x =-11

Step-by-step explanation:

5 +x -2 = -8

3 +x = - 8

x = -3 - 8

x= -11

6 0
3 years ago
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