PLEASE PLS PLS PLS PLS PLS PLS PLS HURRY

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

12/.5

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PLEASE HELP ME!!!! I'LL MARK YOU BRAINLIEST IF YOU ANSWER THIS CORRECTLY!!!!

A 20m ladder and a 15m ladder were leaned against a building. The bottom of the longer ladder was 7m farther from the building than the bottom of the shorter ladder, but both ladders reached the same distance up the building. Find this distance.6m

12m

10m

9m

Answers

Answer:

The correct answer is: d=9m

Step-by-step explanation:

Ok, the ladders leaned against a building make two right triangles with same the same height, which we will call h. For the 20m ladder, its leg is (7+d) and for the 15m ladder, its leg is d, and the two hypotenuses are 20 and 15 respectively.

Then, using the Pythagorean Theorem we have:

20m ladder:

20^2 = h^2 + (d+7)^2 (Eq. 1)

400 = h^2 + d^2 + 2*7*d + 7^2 (expanding the theorem)

400 = (h^2 + d^2) + 14*d + 49 (Eq. 2)

15m ladder:

15^2 = h^2 + (d)^2 (Eq. 3)

Since h^2 + (d)^2 is equal to 15^2, we can substitute (2) into (3):

400 = (15^2) + 14*d + 49

400 = 225 + 14*d + 49

14*d = 400 - 225 - 49 (clearing the variable d)

14*d = 126

d = 9 m

And since we now know that d is equal to 9m. For the longer ladder is (d+7)=(9+7)=16m.

And, then the shorter ladder is 9m from the building and the longer ladder is 16m from the building

Use synthetic division to check -4 is a root of the polynomial expression: x^4+2x^3-9x^2-2x+8=f(x)

Answers

Hello,

........|x^4|x^3|x^2|x^1|x^0
........| 1..|.2...|.-9.|.-2.|.8
x=-3.| ....|.-4..|.8..|.4..|.-8
........| 1..|.-2..|.-1.|..2.|.0

x^4+2x^3-9x^2-2x+8=(x+3)(x^3-2x^2-x+2)+0
-4 is a root of the polynomial expression.

Point B is located at _____.

(3, 0)
(0, 3)
(0, -3)
(-3, 0)

Answers

The point B is located at (3, 0). Therefore option B is the correct answer.

On graph A, B, C, D and E points are given.

What is the graph?

Graph is a mathematical representation of a network and it describes the relationship between lines and points. A graph consists of some points and lines between them. The length of the lines and position of the points do not matter.

The numbers on a coordinate grid are used to locate points. Each point can be identified by an ordered pair of numbers; that is, a number on the x-axis called an x-coordinate, and a number on the y-axis called a y-coordinate. Ordered pairs are written in parentheses (x-coordinate, y-coordinate).

Here, on the point B is located at (3, 0).

The point B is located at (3, 0). Therefore option B is the correct answer.

To learn more about the graph visit:

brainly.com/question/14375099.

#SPJ2

Point B is located at (0, -3). When both x and y coordinates are positive,it lies in the first quadrant. If both are negative, it lies in the thirdquadrant. If x is negative and y is positive, it is in the second quadrant. If xis positive and y is negative, it is in the fourth quadrant.

Find the exact roots of x^2+10x-8=0 by completing the square

Answers

From the original equation x^2+10x-8=0, move the loose number on the other side. Your new equation will be x^2+10x=8. Moving an element from one side to another reverses its sign. From -8 to +8. Then take half of the x-term and square it and add it on both sides. X-term is 10x and 10 is the number, half of it is 5 then square of 5 is 25. Add 25 on both side. Your new equation will be x^2+10x+25=8+25. Then complete the square form of the left side of the equation, (x+5)^2=33. Square root both side then you will get x+5=squareroot of 33. Your x = -5 plus/minus squareroot of 33.

Four less than the product of twice a number and eight

Answers

8+2*a-4 is the right equation
hope that helped :)

So it would be 2 times 8 which equals 16. Then subtract 4 from 16 and get the answer 12.
Hope this helps!

Use the graph below for this question:graph of parabola going through 0, 3 and 2, negative 5.

What is the average rate of change from x = 0 to x = 2? (1 point)

−4

−8

1

5

Answers

Answer:

It should be the 2nd one

Step-by-step explanation:

3rd one is the correct answer for your queation

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