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3 years ago

Identify and explain the error

1 answer:

3 0

You would add 10 to 50 then divide both sides of the equation by -10 and you would get x=4 as your final answer. I recommend using the app Photomath:)

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f(x)=8−4x−x3 g(x)=x2+7x−9 Find f(x)+g(x). Select one: a. x3+x2+3x−1 b. −x3+x+3x−1 c. −x3+x2+11x−9 d. 8x2+3x−9x3

vovangra [49]

Answer:

Step-by-step explanation:

We are given the two functions:

$f(x) = 8 - 4x - x^3\text{ and } g(x) = x^2 + 7x - 9$

And we want to find:

$f(x) + g(x)$

Substitute:

$= (8 - 4x - x^3) + (x^2 + 7x - 9)$

Rewrite:

$= (-x^3) + (x^2) + (7x - 4x) + (8 - 9)$

Combine like terms:

$= -x^3 + x^2 +3x -1$

In conclusion:

$f(x) + g(x) = -x^3 + x^2 +3x -1$

Hence, our answer is B.

7 0

3 years ago

Solve the equation below. Graph the solution on a number line. w/2 = -1 w =

8_murik_8 [283]

Multiply both sides by 2

w= -1×2

simplify 1×2 to 2

w= -2

5 0

3 years ago

In a shelter, the number of kennels is proportional to the number of dogs. The constant of proportionality in terms of dogs per

JulijaS [17]

(27 divided by three because there are only permitted 3 doggies per kennel so the answer is 9)the ratio will be 9 : 27 or simplified version is 3:9

5 0

4 years ago

1. 6 cm 6 cm Find the surface area of the cube. Surface Area = [?] cm² 6 cm

Mariulka [41]

Answer:

The surface area of the cube is equal to 216 cm².

General Formulas and Concepts:
Geometry

Surface Area Formula [Cube]:
$\displaystyle \text{SA} = 6a^2$

a is a side length

Step-by-step explanation:

Step 1: Define

Identify given variables.

a = 6 cm

Step 2: Find Surface Area

[Surface Area Formula - Cube] Substitute in a:
$\displaystyle \text{SA} = 6(6 \ \text{cm})^2$
Evaluate:
$\displaystyle \text{SA} = \boxed{216 \ \text{cm}^2}$

∴ we have found the surface area of the cube to be 216 cm².

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Topic: Geometry

4 0

3 years ago

Read 2 more answers

Let a be the vector of length 125 that when drawn in standard position makes a 144° angle with the positive x-axis. Let b be the

umka2103 [35]

Answer:

The length is 90.033 and the angle that v makes with the positive x-axis is 153.339°

Step-by-step explanation:

Firstly we will have to convert our given vectors to their rectangular Cartesian vector form as follow,

$a=125(icos(144)+jsin(144))=-101.127i+73.473j\\b=39(icos(302)+jsin(302))=20.667i-33.074j$

Now that we have these, we can add them to obtain v as follows,

$v=a+b\\v=-80.46i+40.399j$

Now that we have the Cartesian vector form we can calculate its length and its direction with respect to the positive x-axis as follows(In fact we usually refer the angles from the positive x-axis),

$|v|=\sqrt{80.46^{2}+40.399^{2}}=90.033\\ angle(v)=tan^{-1}(40.399/(-80.46))=153.339$

So the length of the vector is 90.033 and the angle it makes with the positive x-axis is 153.339°.

6 0

3 years ago