solve for x solve for x

Answer:

unsolvable because the second equation is just -2.5 times the first equation.

Step-by-step explanation:

2x-6y=12    then   2x=12+6y     x=6+3y

-5x+15y=-30

substitute x

-5(6+3y)+15y=-30

-30-15y+15y=-30

y=y

Answer:

i think its the 3rd option

Answer:

Step-by-step explanation:

Rule: Y2 - Y1 / X2 - X1

m= 13-5 ÷ 6-2

  =8/4 =2

Hope it helps! :D

Answer:

x=1 and y= 6

Step-by-step explanation:

and for y its a positive cause their both negitives

9514 1404 393

Answer:

Step-by-step explanation:

We must assume the pentagon is regular. Its 5 sides are all the same length as AB, which is 4 units. So, the perimeter is ...

  P = 5s = 5(4) = 20 . . . units

__

The area is given by the formula ...

  A = (1/2)Pa

where P is the perimeter and a is the apothem--the distance from the center to one side.

The center coordinates are (3, 4.75), so the center is 2.75 units from side AB at y=2. Then the area is ...

  A = (1/2)(20)(2.75) = 27.5 . . . square units

Answer:

$10.11

Step-by-step explanation:

Before Tax Price: $9.45

Sale Tax: 7.00% or $0.66

After Tax Price: $10.11

Answer:

9.46

Step-by-step explanation:

divide 9.45 by .07 then add that to 9.45 and round

Answer:

proper fraction

Step-by-step explanation:

Nope just yours l.ma0.

Answer:

Option A

Step-by-step explanation:

Given data

We are told that the weight of the rabbit is 2.8 kilograms

We also want to convert from kilograms to grams

We  know that 1kg= 1000 grams

            Hence 2.8 kg= x gram

Cross multiply

x= 2.8*1000

x= 2800 grams

Hence the weight in grams is 2800grams

Option A is correct

Answer:

it is A

Step-by-step explanation:

2,800

then both equation r same after we re arrange it so no result

Answer:

2.5 quarts or 5/2

Step-by-step explanation:

Answer:

2/5 quarts or 0.4 quarts

Step-by-step explanation:

there are 25 persons

she made 10 quarts soup

10 quarts / 25 persons = 2/5 quarts = 0.4 quarts

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Explanation:

Let's consider the tank's full capacity is 240 gallons. I'm picking this number because 12*20 = 240.

If the tank is 240 gallons, then the inlet pipe can fill it at a rate of 240/12 = 20 gallons per hour. Note after 12 hours, we have 12*20 = 240 gallons filled assuming the outlet pipe is sealed shut.

At the same time, the outlet pipe is draining at a rate of 240/20 = 12 gallons per hour. After 20 hours, the outlet pipe would drain out 12*20 = 240 gallons assuming the inlet pipe is not adding any water.

With the two pipes playing this tug-of-war battle, the inlet pipe ultimately wins because it's adding more gallons of water each hour, compared to the amount drained per hour. The net change is +20-12 = 8 gallons per hour.

This means it will take 240/8 = 30 hours to fill the tank with both pipes open.

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Another approach:

The inlet pipe can fill the tank in 12 hours, so it gets 1/12 of the job done per hour. The outlet pipe drains the tank in 20 hours, so it gets 1/20 of the job done in one hour.

The net change is 1/12 - 1/20 = 5/60 - 3/60 = 2/60 = 1/30

This means that when both pipes are open, 1/30 of the job is done per hour. By "job", I mean "filling the tank".

If x is the number of hours needed to do one full job, then we can multiply that by the unit rate (1/30) and set the result equal to 1

(rate)*(time) = 1 job

(1/30)*x = 1

x = 30*1

x = 30

It takes 30 hours to do the job with both pipes open.

Answer:

1. his account will be 120

2. 6 weeks

3. Yes, Lala will get 120 in 4 weeks while Andra will get 100

If you wanted to know Andra equation will be y=20x+20

Step-by-step explanation:

Hope this helped

Answer:

Step-by-step explanation:

The answer choices are not displaying properly. There are many ways to express the relation. For example:

X = 60% of 25

X = 0.60 × 25

X = 0.6 × 25

X = 60/100 × 25

X = 6/10 × 25

X = ⅗ × 25

Answer:

No

Step-by-step explanation:

0.3/4= 0.075

0.9/15= 0.016

They aren't equal.

Answer:

no they are not

Step-by-step explanation:

cause I said

==========================================================

Explanation:

The center is the origin, so (h,k) = (0,0).

The point (x,y) = (2,6) is on the circle's edge. We'll use these four values to find the value of r^2

(x-h)^2 + (y-k)^2 = r^2

(2-0)^2 + (6-0)^2 = r^2

2^2 + 6^2 = r^2

4 + 36 = r^2

40 = r^2

r^2 = 40

We don't need to solve for r itself. If you wanted to, you'd get the radius to be r = sqrt(40) = 2*sqrt(10) = 6.324555 approximately.

------------------

Since h = 0, k = 0, and r^2 = 40, we can say:

(x-h)^2 + (y-k)^2 = r^2

(x-0)^2 + (y-0)^2 = 40

x^2 + y^2 = 40

Answer:

A:

1,5

2,6

3,7

4,8

B:

1,8

2,7

C:

3,6

4,5

Answer:

A) 2 & 8    1 & 7

B) 1 & 8     2 & 7

C) 3 & 6    4 & 5

Step-by-step explanation:

Answer:

x=3

Step-by-step explanation:

51 degrees + (7x+18) degrees = 90 degrees

7x+18=90-51

7x+18=39

7x+18-18=39-18

7x=21

7x/7=21/7

x=3

Answer:

Complex Decimal.

it is the correct answer.

Answer:

I’m confused on what you want me to do but that is false

Step-by-step explanation:

Answer:

the answer is 1.309<1315

Answer:

4

Step-by-step explanation:

the y intercept is never with another variable, -1/3 would be the slope

Answer:

4

Step-by-step explanation:

if there are 8 ounces for 2 then there are 4 ounces for 1.

Answer:

with what?

Step-by-step explanation:

Answer:

the answer is 56.25

Step-by-step explanation:

.32x=18

×=56.25

Step-by-step explanation:

hope this helps. I worked out then posted.

Answer:

for step of kepp of yours alive

Answer:

1/9

Step-by-step explanation:

2/3 x 1/6 = 2/18 or 1/9