Mathematics High School

show that (3x+7)² -84x = (3x-7)​

Answers

Answer 1
First expand...

(3x+7)^2 = 9x^2+42x+49

Bring down -84x...

9x^2+42x+49-84x

Solve...

9x^2-42x+49

Factor...

(3x-7) (3x-7) = (3x-7)^2

Related Questions

The rectangle below has an areas of x^2+8x+15 square metres and a width of x+3 meters what expression represents the length of the rectangle

Answers

Answer: x+5 or ((x^2+8x+15)/(x+3))

Step-by-step explanation: First let's assign our variables.

x^2+8x+15 = Area

X+3 = Width

? = Length

If the equation of a=lw, then we can substitute in our variables.

a=lw

x^2+8x+15= L (x+3)

Now we must isolate L.

Divide both sides of the equation by 'x+3'

x^2+8x+15= L (x+3)

x+3                 x+3

x+5= L

What is the square root of -16

Answers

Answer:

The square root of -16 is 4 i

Answer:

You can't but if it was 16, not -16 it will be 4.

Step-by-step explanation:

help please? im giving brainliest for best answer

Answers

I’m confused, what is the question?

Someone please help me I’ll give out brainliest please dont answer if you don’t know

Answers

Answer:

x=2

Step-by-step explanation:

x-5=-3

x=2



Calculate the percentage increase of an item that cost R59.99 in 2020 and R 65.99 in 2021​

Answers

Answer:

the answer is of this question R = 10

Answer:

The answer is 6%

Step-by-step explanation:

[tex]65.99 - 59.99 = \frac{6 \times 100}{100} = 6\%[/tex]

Math: If f(x) = 2x^2 - 5x - 15, what is f(-3)? *
O
24
42
18
3

Answers

Step-by-step explanation:

1 rst. 2 x2-5x-15 da 18 rest

Find the value of x
Thanks bb please explain

Answers

Answer:

x=24

Step-by-step explanation:

Hello There!

Angle E and angle D are supplementary angles meaning that the sum of the two angles equals 180

So we setup an equation

180=2x+12+5x

step 1 combine like terms

5x+2x=7x

now we have

180=7x+12

step 2 subtract 12 from each side

12-12 cancels out

180-12=168

now we have

168=7x

step 3 divide each side by 7

7x/7=x

168/7=24

we're left with~ x=24

~TheMathWiz

Answer:

......... .............. .

The tide in Port Aransas peaks every 12.2 hours. The tide ranges from 2.9 to 1.3 meters. Suppose that the low tide is at t=1, where t is the time in hours.

Amplitude:
Vertical Shift:
Period:
Phase Shift:
What direction is the phase shift?
To the nearest thousandths, determine the height of the table at 3.5 hours?

Answers

[tex]\int\limits^a_b {x} \, dx[/tex]Answer:

[tex]x^{2} \lim_{n \to \infty} a_n[/tex]

Step-by-step explanation:

heading here. mdcps-logo. Dadeschools.net. Remember Username. Please Wait... Forgot Username /Pas

Please HELP ME T-T Roxxane all she wanna do is party all night

Answers

Answer:

Step-by-step explanation:

{-1,0,1,2}

What is the equation of the line that passes through the point (5, 6) and has a slope
of 3/5?

Answers

Answer:

Step-by-step explanation:

Y'all need help here​

Answers

Answer:

A

Step-by-step explanation:

Answer:

b. 1 inch : 5 miles is sure

Can someone pls help me

Answers

Answer:

10

Step-by-step explanation:

Answer: its an acute angle so its 90

Step-by-step explanation:

help i don’t get this

Answers

Answer:

0.42

Step-by-step explanation:

4.2 * 1/10 = 4.2/10

= 0.42


4x - 3y = -3
4x + y=17
The solution is....

Answers

1. Subtract the second equation from the first and solve for y: 0 - 4y = -20 => y=5
2. Substitute y=5 into one of the equations and solve for x: 4x - 3(5) = -3 => 4x = 12 => x=3

So the solution is (x, y) = (3, 5)

What is the slope of these ordered pairs (3,-4(6,1)

Answers

Answer:

The slope would be 5/3

Step-by-step explanation:

Let me know if u have to simplify it

is it proportional or non proportional ​

Answers

the answer is c. okayyyyyy ty y ty ty e h a bc abjagained sjnsskemd bc dd

Answer:

Proportional

Step-by-step explanation:

It passes through (0,0) and is a completely linear line I hope this helps :))

Please help answer correctly !!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

y = -1/2x + 1

Step-by-step explanation:

Slope-intercept form:

y = mx + b, where m - slope, b - y-intercept

We are given two points on the graph:

(0, 1) and (2, 0)

The first point gives us the y-intercept:

b = 1

Finding the slope using slope formula:

m = (y2 - y1)/(x2 - x1)m = (0 - 1)/(2 - 0) = -1/2

The formula of the line:

y = -1/2x + 1

Lol i need help plsplspls

Answers

Answer:

y = 15

y = -10

Step-by-step explanation:

y=-5x

y= -5(-3)

= 5 × 3 = 15

y = 15

y = -5x

y = -5(2)

y = -5 × 2

y = - (5 × 2)

5 × 2 = 10

y = -10

What is the sum of the interior angles of this pentagon?
O 900°
O 360°
O 540
O 180°

Answers

Answer:

Step-by-step explanation:

360 + 3*180 = -360 + 540 = 180

For four sides -360 + 180*4 = 360

n-2)*180

For a fifteen sided share the sum of angles = (15-2)*180 = 13*180

Answer:

180

Step-by-step explanation:

How do you think statistics may at times not say something? How can a well-designed study be used to carefully say everything that is important about a population? Is it possible to do so?

Answers

Answer:

While statistics are extremely valuable, they are also notorious for being a means that people use to make false and misleading arguments. Also far too often statistics are obtained by taking a sample from a larger group and assuming the whole group has the same characteristics as the sample.

A sample provides a smaller set of the population for review, that delivers data that is useful to represent the whole population. Surveying a smaller sample, as opposed to the entire population, can save precious time for researchers and offer urgent data.

Step-by-step explanation:

Hope it is helpful.....

At Putt Putt, they offer a special for unlimited mini golf. You decide to go golfing with your friends. After golfing and purchasing lots of food, you end up spending $50. In total you leave Putt Putt with $5. Let s represent the amount of money you started with.
Part 1: Write an equation involving s
Part 2: Solve for how much money you brought to Putt Putt.

Answers

Answer:

part 1: a-50=5. a=55

Step-by-step explanation:

because fifty five minus 50 is equal to 5

Find the x and y intercepts of the graph of the linear equation 3x + 6y= 24

X intercept=

y intercept=​

Answers

Answer:

y=-0.5x+4

Step-by-step explanation:

x intercept=-0.5/1

y intercept=4

Which of the following is an example for a physical property that can be exploited for sparation?

Answers

The volume of an object

how many solutions does 8x + 7 = 8x + 7 have

Answers

Answer:

infinetly many solutions

Step-by-step explanation:

Answer:

All real numbers

Step-by-step explanation:

Since they are the same x can be any number. Making the solution all real numbers.

Graph the solution to the following linear inequality in the coordinate plane.
2x + y > 4

Answers

Answer:

Step-by-step explanation:

Answer:

Please refer to the attachment

Hope it helps

Pls mark me as the brainliest

Thank you

find area of triangle ​

Answers

8 .. 4 x 4 x 1/2 = 8 ... sorry if I’m wrong

Answer:

8 in²

Step-by-step explanation:

formula for area of a triangle is 1/2(bxh)

1/2(4x4)

1/2(16)

8

(3i+5)+(2-6i) simplify

Answers

Answer:

(3i+5)+(2-6i)

⇒ 3i+5+2-6i

⇒3i-6i+5+2

⇒-3i+7

The simplified form of (3i+5)+(2-6i) will be -3i+7

Select all ratios equivalent to 12:6.
120:60
35:9
55:3
10:5
Please help I’ll do anythng

Answers

10:5 is the answer hope u get a good grade


Which expression is equivalent to 5(8+4)
A 8(5+4)
B) 4(8+5)
C) 5(9+3)
D) 5(10+1)

Answers

c, 5(9+3)
because both answers equal to 60

Answer:

5(8+4)=60

Step-by-step explanation:

To find the answer answer each one to get 60

A. 8(5+4)=64

B. 4(8+5)=52

C. 5(9+3)=60

D. 5(10+1)=55

So that means C is correct.

6(1 - 6x) < 38 - 4x
What is the answer to this equation.

Answers

Answer:

x>-1

Step-by-step explanation:

Answer:

x > -1

Step-by-step explanation:

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