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2 years ago

8

Please help please help please help please help please help please help please help please help

1 answer:

german2 years ago

3 0

Answer:

11x + y = 25

Step-by-step explanation:

Start with y = mx + b

Slope is -11, so m = -11

Point is (2, 3), so we plug that back in to get the intercept.

3 = -11 * 2 + b

3 = -22 + b

b = 25

y = -11x + 25

11x + y = 25 in standard form.

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What is incorrect in this? And how do I correct it?

german

$\bf \begin{cases} y=3x+2\\ -3x+y=2\\ 3x-y=-2\\ ------\\ 6x-2y=10 \end{cases}\implies \begin{cases} 3x-y=-2\\ 6x-2y=10 \end{cases}\implies \begin{bmatrix} 3&-1&|&-2\\ 6&-2&|&10 \end{bmatrix}\\\\ -------------------------------$

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7 0

2 years ago

I need help please I beg of you``` MATH/ GRAPH

kherson [118]

The graph I did is pretty bad but here’s how to do it.

You start at -2 and then go down 3 and over 1 until you reach the end of the graph. Vice versa, you go up 3 and over 1 to get something like below.

6 0

2 years ago

How high up on the wall will a 20-foot ladder touch if the foot of the ladder is placed 5 feet from the wall? Round to the neare

Maurinko [17]

Use Pythagorean theorem
a2 + b2 = c2
x2 + 5^2 = 20^2
x^2 + 25 = 400
x^2 = 375
x = 19.4 feet

7 0

1 year ago

Read 2 more answers

A circular city plaza is surrounded by a row of bricks. The area of the plaza is 1,520 square meters. How long is the row of bri

Korolek [52]

Answer:

138 meters

Step-by-step explanation:

step 1

Find the radius of the circular city plaza

The area is equal to

$A=\pi r^{2}$

we have

$A=1,520\ m^2$

$\pi =3.14$

substitute

$1,520=(3.14)r^{2}$

solve for r

$r^2=1,520/3.14\\r=22\ m$

step 2

we know that

To find out how long is the row of bricks, determine the circumference of the circular city plaza

The circumference is equal to

$C=2\pi r$

we have

$r=22\ m$

$\pi =3.14$

substitute

$C=2(3.14)(22)=138\ m$

8 0

2 years ago

I am doing Polygons with Algebra and I have a irregular shape with letters on each point

kolbaska11 [484]

Answer:

Step-by-step explanation:

Number of side = n = 7

Sum of interior angles of 'n' sided polygon = (n - 2) *180

= (7 - 2)* 180

= 5 * 180

= 900

x + 150 + x -20 + 140 + 120 + x + 20 + 130 = 900

Combine like terms

x +x +x + 150 - 20 + 140 + 120 + 20 +130 = 900

3x + 540 = 900 {Subtract 540 from both sides}

3x = 900 - 540

3x = 360 {Divide both sides by 3}

x = 360/3

x = 120

Interior angle Exterior angle

∠A = 120 180 - 120 = 60

∠B = 130 180 - 130 = 50

∠C = 120 + 20 = 140 180 - 140 = 40

∠D = 120 180 - 120 = 60

∠E = 140 180 - 140 = 40

∠F = 120 - 20 = 100 180 -100 = 80

∠G = 150 180 - 150 = 30

6 0

2 years ago