Why is no one helping me please please help

Answer:

Step-by-step explanation:

(3a-7)²=(3a-7)(3a-7)

= 9a²-21a-21a+49

= 9a²-42a+49

Therefore the error in that answer is -42a was replaced with -21a.

Answer:

(3a-7)²=(3a-7)(3a-7)

= 9a²-21a-21a+49

= 9a²-42a+49

Step-by-step explanation:

Answer:

30 I THINK

Step-by-step explanation:

Answer 30 i hopeee

I hope that helps lol

Answer:

[tex]x=16 \ \ and \ \ y=4[/tex]

Step-by-step explanation:

Suppose the numbers are x and y

One number say x is equal to 4 times another number say y

[tex]x=4y[/tex]  ---------------- (1)

Their difference is 12

[tex]x-y=12[/tex]  ------------(2)

Put x=4y in equation (2)

[tex]4y-y=12[/tex]

[tex]3y=12\\y=4[/tex]

Put y=4 in equation (1)

[tex]x=4(4)\\x=16[/tex]

Answer:

now how did you knew people was doing it

Step-by-step explanation:

it C trust

Answer:

The answer is 28 (option D)

Step-by-step explanation:

Im big Brain

Answer: A rate

Step-by-step explanation:

A rate is a ratio that compares two different quantities with different units of measure

Answer:

2x-3

Step-by-step explanation:

Answer:

I think it is c, sorry if I am wrong.

Answer:

-2<=x<=5

Step-by-step explanation:

|2x - 3|< =7

-7<=2x-3<=7

-4<=2x<=10

-2<=x<=5

Answer:

4.121216129m

Step-by-step explanation:

use sohcahtoa

tan(70) x 1.5m = 4.121216129m

The height of the tree is 4.12 m.

Given,

I put a ladder 1.5m away from a tree.

The ladder is inclined at 70 degrees about the horizontal.

We need to find out what is the height of the tree.

It is given by:

Tan Ф = Perpendicular / Base

Draw a figure of the given statement.

                       /   | A

                  /        |

(ladder) /             | (tree)

         /.                |

     /.                    |

C /_70°_______ | B  

<--------1.5m-------->              

Find the AB.

AB = height of the tree.

TanФ = AB / CB

Tan 70° = AB / 1.5m

2.7474 = AB / 1.5m

AB = 2.7474 x 1.5m

AB = 4.12 m

Thus the height of the tree is 4.12 m.

Learn more about finding the height of a tree here:

https://brainly.com/question/23804579

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Answer:

Step-by-step explanation:

Volume of the cone, V=1/3*Π*r^2*h

we have the slant height, and we need to find the h, height

a^+b^2=c^2

where c is 13

169=25+h^2

h^2=144

h=12

V=1/3*3.14*25*12=100*3.14=314.15 ft^3

Answer:

1/8 or .125

Step-by-step explanation:

Because they fall under the same denominator just subtract the numerator.

6/8 - 5/8 = 1/8

Answer:

In the picture below

Step-by-step explanation:

Answer:

x axis

Step-by-step explanation:

time is always independent

Answer:

[tex]1 \times { 10}^{ - 9} m[/tex]

Step-by-step explanation:

It can be written in scientific notation as [tex]1 \times { 10}^{ - 9} m[/tex],

Answer:

a) 1 nm = 0. 000 000 001 m

b) 1 nm = 1×10⁻⁹ m

Answer:

X=20

Step-by-step explanation:

Answer:

C. x = 20

Step-by-step explanation:

1 /2 x+6−x=x−4−x

−1 /2 x+6=−4

−1 /2 x+6−6=−4−6

−1 /2 x=−10

( 2/ −1 )*( −1 /2 x)=( 2/ −1 )*(−10)

x=20

Answer:

A) [tex]\sqrt{2}[/tex]

B) [tex]4\sqrt{11}[/tex]

Step-by-step explanation:

A) You can add these expression because they contain the same square root:

[tex]6\sqrt{2} - 5\sqrt{2} = (6 - 5)\sqrt{2} =\sqrt{2}[/tex]

B) Same as above:

[tex]\sqrt{11} + 3\sqrt{11} = (1 + 3)\sqrt{11} = 4\sqrt{11}[/tex]

Answer:

[tex]A) \: 6 \sqrt{2} - 5 \sqrt{2} = (6 - 5) \sqrt{2} = \sqrt{2} \\ [/tex]

[tex]B) \sqrt{11} + 3 \sqrt{11} = (1 + 3) \sqrt{11} = 4 \sqrt{11} [/tex]

For literal equations you do not necessarily need a numerical answer. You just need to get the variable you are supposed to solve for on one side of the equation by itself. To do this you will follow the same steps you do when you normally solve for x (or any other variable)

#9-Step by step

Q=25[tex]\pi[/tex]h

divide 25[tex]\pi[/tex] on both sides of the equation

Q/25[tex]\pi[/tex]=h

h=Q/25[tex]\pi[/tex]

Since his can't be simplified any further this is your answer

#11. y=7m+6

First subtract 6 over to the other side

y-6=7m

then divide the 7 over

(y-6)/7=m

m=(y-6)/7

#13 A=(Z+7)3

Divide the three over to the other side of the equation

A/3=Z+7

Now the 7 is free to be subtracted from both sides

(A/3)-7=Z

#17. (2x/5)-9=6

First add 9 to both sides

2x/5=6+9

2x/5=15

Multiply both sides of the equation by 5

2x=5(15)

2x=75

Divide by 2

x=75/2

x=37.5

Answer:

C:S--------> 3:5

1520/5=304

3 x 304= 912

912+1520=2432

1520/2432 x 100

Ans = 62.5% seats occupied

Answer:

C:S--------> 3:5

1520/5=304

3 x 304= 912

912+1520=2432

1520/2432 x 100  

Ans = 62.5% seats occupied

Answer:

C.)Yes, because the pictures do not accurately represent the proportions of the distances for each leg of the triathlon.

No, because the height of each column corresponds to the number of miles for each leg of the triathlon. Then the correct option is A.

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

The picture graph below displays the number of miles for each leg of a triathlon, in which the participants swim 2.4 miles, bike 112 miles, and run 26.2 miles.

Then the number swim, bike, and the run symbol will be

Swim = 2.4 / 1 = 2 and 0.4

Bike = 112 / 28 = 4

Run = 26.2 / 8 = 3 and 0.275

No, because the height of each column corresponds to the number of miles for each leg of the triathlon. Then the correct option is A.

More about the Algebra link is given below.

https://brainly.com/question/953809

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Answer:

the answer is A

Step-by-step explanation:

y increases by 2(rise) and x increases by 3(run), so it would be 2/3

Answer:

let x be cost of a hotdog

let y be cost of hamburger

so,

5x + 4y = 17.75                    eq. 1

4x + 5y = 18.25                    eq. 2

manipulate eq. 1 so solve for x:

5x = 17.75 - 4y

x = 17.75/5 - (4/5)y

x = 3.55 - (4/5)y                  eq. 3

substitute eq. 3 to eq. 2:

4(3.55 - (4/5)y) + 5y = 18.25

14.2 - (16/5)y + 5y = 18.25

14.2 + (9/5)y = 18.25

(9/5)y = 18.25 - 14.2

4.05= (9/5)y

y = 2.25

x = 3.55 - (4/5)(2.25)

x = 1.75

hotdog costs $1.75

hamburger costs $2.25

Step-by-step explanation:

-13x + 3 is decreasing and has a negative slope.

Answer:

24 sq cm

Step-by-step explanation:

20 sq cm + 4 sq cm = 24 sq cm

Answer:

1,600 dollars

Step-by-step explanation:

The easiest way to solve it is to find the dollar for 1 percent.

Since 480 accounts for 30% of the whole thing, we can do 480 divided by 30 to get 16 as 1 percent. This means that 16 times 100 percent would give us the total money spent, giving us 1,600 as our answer.

Answer:

What is the question?

Step-by-step explanation:

Comment it

Answer:

same i feel you bru

Step-by-step explanation:

i'm actually, uh, procrastinating on brainly. can i vent? actually i will anyways so here: i have an science quiz on space and the moon phrases and i barely payed attention in class so i don't even know how to solve half of the problems. i normally always do ok on quizzes but i feel like this one is different and i'm going to fail. it's due by today at midnight and i'm procrastinating on brainly to take my mind away from reality. i know i'm being a total coward by trying to avoid what is my own consequences but... here i am haha ;-; it would be better if i at least started studying now even if it's short  to get my grade up just a little but i'm scared to even look at the quiz. i also have a lot of homework and an essay that's due tomorrow that i haven't started on yet... and yet i procrastinate. i don't understand myself and sometimes i want to cry because i don't know why i'm like this. i feel like the more homework i get, the more i procrastinate. i'm miserable really.

Answer:

x is greater than or equal to 3. x ≥ 3

Step-by-step explanation:

Answer:

x ≥ 3

Step-by-step explanation:

The arrow goes to the right, the dot is shaded in and x is at 3.

Therefore, x ≥ 3.

Answer:

400

Step-by-step explanation:

Tge 6 in the tens place is greater than 5, so you round the 3 up to 4.

If the number that determines where you round is 5 or more, round up.

So 366 rounded to the hundreds place is 400.

The answer is 400.

Happy to help!!! :)