Please help me on this

Step-by-step explanation:

2x - 3y = 9

2x + 3y = 3

__________ -

-6y = 6

y = -1

2x - 3y = 9

2x - 3(-1) = 9

2x - (-3) = 9

2x = 12

x = 6

Answer:

here's how you calculate sales tax after a discount.

Sale Price = original price – (% of discount * original price)

Sales Tax = Sales Tax rate * Sale Price.

Sales Tax = 0.05 * $17.21 = $0.8605 = $0.86.

Step-by-step explanation:

Answer:

your answer would be 1kg

Step-by-step explanation:

Answer: The largest one is 1kg

Step-by-step explanation:

Answer:

16.4%

Step-by-step explanation:

$1665=100%

$53.40=?

53.40×100÷1665

=16.4%

Answer: x^2 + 6x + 9

Step-by-step explanation:

first, you square everything.

x^2 + 2x x 3 + 3^2

then, you calculate/evaluate.

x^2 + 6x + 9

Answer:

74

Step-by-step explanation:

because it is alternate angle

Answer:

1. 106º

2. 146º

Step-by-step explanation:

1. The two angle are supplementary which means that together they will equal 180º

2. The acute angle next to the angle in question is completing the 180º of both the triangle and the line meaning that the 90º of the triangle plus 56º of the other angle must be the same amount of degrees as angle x.

Answer:

38:48=3:4

48:42= 8:7

20:30= 2:3

16:14=8:7

9:12=3:4

56:49=8:7

24:32=3:4

24:36=2:3

18:27=2:3

Answer:

True

Step-by-step explanation:

Answer:

we have:

u(1) = 18

u(2) = 21 = 18 + 3

u(3) = 24 = 18 + 3.2

u(4) = 27 = 18 + 3.3

.......

=> the sequence has: u(1) = 18

                                    d = 3

=> u(n) = 18 + 3(n - 1) = 3n + 15

so the recursive formula for the sequence is u(n) = 3n + 15

Step-by-step explanation:

Answer:

20 %

Step-by-step explanation:

tell me if I'm wrong , your welcome and merry Christmas !!

Answer: 20%

Step-by-step explanation: 50 times 5 is 250. If you take 5 out of 100 you get 20’s

Answer:

Step-by-step explanation:

Time taken in each lap = 4 min

Total laps = 11

Total time = 11 x 4 = 44min

Answer:

44 minutes

Step-by-step explanation:

4 minutes per lap . He is running 11 laps. Multiply 4 times 11 and it equals 44

We are given:

An even number 'n', multiplied by the next consecutive even number is 168

Solving for n:

From the given statement, we can say that:

n(n+2) = 168                      [n multiplied by the next even number 'n+2']

n² + 2n = 168

n² + 2n - 168 = 0               [subtracting 168 from both sides]

We can see that we now have a quadratic equation, solving using splitting the middle term

n² + 14n - 12n - 168 = 0

n(n + 14) -12(n + 14) = 0      [factoring out common terms]

(n-12)(n+14) = 0

Here, we can divide both sides by either (n-12) OR (n+14)

Checking the result in both the cases:

(n + 14) = 0/(n-12)                     (n-12) = 0/(n+14)

n + 14 = 0                                 n - 12 = 0

n = -14                                      n = 12

Both these values are even and since we are not told if the number 'n' is positive or negative, both 12 and -14 are the possible values of n

Answer:

cross multiply

Step-by-step explanation:

Answer:

OOOoOOOOOOOOooOOooOOOoOoOoOoOoOoOooooooooOOOOFFFFFFFFFFFFFFFFFFFFF

Step-by-step explanation:

You did the same thing to me

Answer:

150$

Step-by-step explanation:

Answer: 150

Loli

threhwrthwrhwryjwyt

Answer:

x=-3

x=-4

Step-by-step explanation:

-2|7+2x|=-2

|7+2x|=1

7+2x=1

x=-3

7+2x=-1

x=-4

Answer:

He’s a good man

Step-by-step explanation:

3n + 7 = 16 (equation)

3n = 9

n = 3 (answer

Answer:

The answer is z= 7.5

Step-by-step explanation:

Answer:

Step-by-step explanation:

56

Answer:

8.246 units long

2sqrt(17) units long in simplest radical form

Step-by-step explanation:

Use the Pythagorean Theorem to find the missing leg length:

a^2+b^2=c^2

4^2+b^2=sqrt(84)^2

16+b^2=84

b^2=68

b=sqrt(68)

b=2sqrt(17) <-- Simplest Radical Form

b=8.246

So the third side is approximately 8.246 units long

Answer:

35% of the cupcakes were Mocha.

Step-by-step explanation:

So, 28 + 52 = 80 which means the question is: 28 is what percent % of 80? And 28 is 35% of 80. Hope I helped! Sorry if not. Have a wonderful day and an even better Christmas break! Remwmber to focus on the positive and give me a follow! ;) Bye!

Step-by-step explanation:

you need to mulitiply the 4 to x and -3

4x-12

if you need to solve for x: 4x=12

X=3

The answer is 4x-12

if you multiply 4 times x it is 4x, and if you multiply 4 by negative 3(-3) the answer is negative 12 (-12), so you put 4x together with -12 that would be 4x-12

Answer:

x = 6

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Step-by-step explanation:

Step 1: Define Equation

3 - 2x = -1.5x

Step 2: Solve for x

Step 3: Check

Plug in x into the original equation to verify it's a solution.

Here we see that -9 does indeed equal -9.

∴ x = 6 is the solution to the equation.

Answer:

x= 6

Step-by-step explanation:

3-2x= -1.5x

-3       -3

-2x= -1.5x - 3

+1.5x   +1.5x

-.5x= -3

divide both sides by -.5

x = 6

Answer:

97o im pretty sure

Step-by-step explanation:

Answer:

Your answer should be C

Step-by-step explanation:

63+44=107

Answer:

x=11

Step-by-step explanation:

since the triangle is an isosceles triangle, angle 2 should be angle 42 so,

2x+20=42 degrees

2x=22

x=11

Answer:

Fourth choice, 16

Step-by-step explanation:

The 2 angles are both 74 degrees, so the side that is facing each angle will be the same length, so:

9x - 73 = 3x + 23

add 73 to both sides

9x = 3x + 96

subtract 3x from both sides

6x = 96

divide by 6

x = 16

Answer:

14 3/8 pounds

Step-by-step explanation:

Given

Total pounds donated = 50 pounds

Amount for dogs D = 17 3/4 pounds

Amount for puppy P = 17  7/8 pounds

Required

Amount of cat food C

Total = D + P + C

50 = 17 3/4 + 17 7/8 + C

50 = 71/4 + 143/8 + C

50 = (142+143)/8 + C

50 = 285/8 + C

C = 50 - 285/8

C = 400-285/8

C = 115/8

C = 14 3/8

Hence the pounds of cat food donated was 14 3/8 pounds

Answer:

Step-by-step explanation:

the shaded area would be

200*75=15,000 ft^2

from this are we have to subtract the are of the house and of the  garage

house= 40*40=1600

garage=24*30=720

house and garage= 1600+720=2320

15,000-2320=12,680

Answer:

12680 ft²

Step-by-step explanation:

First we will find the area of the house and then the garage.

They're both rectangles so we should use this formula [tex]A=l*w[/tex].

Area Of The House:

[tex]A=l*w\\A=40*40\\A=1600ft^2[/tex]

Area Of The Garage:

[tex]A=l*w\\A=24*30\\A=720ft^2[/tex]

Adding the two areas:

Now we have to add the two together to find how much of the space they take up in the yard.

[tex]1600+720=2320[/tex]

Area Of The Yard:

[tex]A=l*w\\A= 200*75\\A=15000ft^2[/tex]

Subtracting The Two Areas To The Yard's Area:

[tex]15000-2320=12680ft^2[/tex] and that is it!