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3 years ago

Solve for X Will give brainiest

Mathematics

2 answers:

madreJ [45]3 years ago

4 0

Answer:

x = -6

Step-by-step explanation:

y + 64 + 27 = 180

y + 91 = 180

y = 89

x + 97 + y = 180

x + 97 + 89 = 180

x + 186 = 180

x = -6

oksian1 [2.3K]3 years ago

4 0

It’s x=-6 but don’t forget about the end of the year test

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Complete the steps to solve the polynomial equation x3 – 21x = –20. According to the rational root theorem, which number is a po

jeka94

Answer:

Zeroes : 1, 4 and -5.

Potential roots: $\pm 1, \pm 2, \pm 4, \pm 5, \pm 10, \pm 20$ .

Step-by-step explanation:

The given equation is

$x^3-21x=-20$

It can be written as

$x^3+0x^2-21x+20=0$

Splitting the middle terms, we get

$x^3-x^2+x^2-x-20x+20=0$

$x^2(x-1)+x(x-1)-20(x-1)=0$

$(x-1)(x^2+x-20)=0$

Splitting the middle terms, we get

$(x-1)(x^2+5x-4x-20)=0$

$(x-1)(x(x+5)-4(x+5))=0$

$(x-1)(x+5)(x-4)=0$

Using zero product property, we get

$x-1=0\Rightarrow x=1$

$x-4=0\Rightarrow x=4$

$x+5=0\Rightarrow x=-5$

Therefore, the zeroes of the equation are 1, 4 and -5.

According to rational root theorem, the potential root of the polynomial are

$x=\dfrac{\text{Factor of constant}}{\text{Factor of leading coefficient}}$

Constant = 20

Factors of constant ±1, ±2, ±4, ±5, ±10, ±20.

Leading coefficient= 1

Factors of leading coefficient ±1.

Therefore, the potential root of the polynomial are $\pm 1, \pm 2, \pm 4, \pm 5, \pm 10, \pm 20$ .

3 0

4 years ago

What is the percent error of 7cm

antoniya [11.8K]

The answer is 7.14%

Your ruler measuring centimeters has lines for each centimeter. The rule for error is anything between 6.5 and 7.5 is considered 7cm. So the degree of error is plus or minus .5cm.
Your aim is 7cm so you divide your error of .5 by your target measurement. .5/7= 7.14 percent.

8 0

4 years ago

Please help me answer these questions

sp2606 [1]

Answer: 1. D. IV

2. A. I

3. A. I

Step-by-step explanation: 1. You have to move the quadrilateral (the shape) 7 units to the right and down 5 units. You can see that it is in the fourth quadrant.

2. You have to flip the shape over the y-axis. It moves to the first quadrant.

3. If you rotate the shape to the right around the origin, it ends up in the first quadrant.

3 0

3 years ago

Find the 74th term in the sequence: 83,79,75 show work

Maslowich

Answer:

a₇₄ = - 209

Step-by-step explanation:

There is a common difference between consecutive terms , that is

79 - 83 = 75 - 79 = - 4

This indicates the sequence is arithmetic with nth term

$a_{n}$ = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 83 and d = - 4 , then

a₇₄ = 83 + (73 × - 4) = 83 + (- 292) = 83 - 292 = - 209

6 0

2 years ago

Winston earns $140.00 by selling 56 hotdogs at the school BBQ. If the cost of each hot dog stays the same, how many more hot dog

svlad2 [7]

Find the price for 1 hotdog:

$140 / 56 = $2.50 per hotdog.

He wants to earn 175 and already earned 140

175 - 140 = 35

He wants to earn $35 more.

Divide the mount he needs to earn by the price of 1 hotdog:

35 / 2.50 = 14

He needs to sell 14 more hotdogs.

3 0

3 years ago