The system shown has one solution; convince me that the solution exists
without solving it or graphing it?
2x - y = 5
x + 3y = -8

Answer:

Choice #1)  4.7 cm

Step-by-step explanation:

circumference of full circle = 2(r)(3.14)

a full circle would be = 2(3)(3.14) = 18.84 cm

It is 1/4 circle so 18.84/4=4.7 cm

Answer:

10.7

Step-by-step explanation:

1. I first grabbed a ruler to measure the other straight side of the figure.

2. Both of the straight sides were 3 cm so I knew that the answer had to be greater than 6 cm.

3. I then estimated that the other side was longer than the 3 cm.

4. I then had to my logic to figure out the answer and I very quickly realized that 4.7 cm would not make since because that is less than 6 cm. I know 7.7 cm would not make since because I knew the curved side was longer than 3 cm not shorter. 18.8 cm did not make since because that answer has WAY to much cm. Using the process of elimination, 10.7 cm was the only answer that made since.

Answer:

12

Step-by-step explanation:

12+3=15

Step-by-step explanation:

1.2 x 5 = 6.0

0.9 x 1.1 = .99

1.5 x 2 = 3.0

Answer:

1 1/4 of a liter

Step-by-step explanation:

Answer:

We use the power of a product rule when there are more than one variables being multiplied together and raised to a power. The power of a product rule tells us that we can simplify a power of a power by multiplying the exponents and keeping the same base.

3 raised to the power of 4 is = 81

Answer:

yellow

Step-by-step explanation:

Answer:

The answer 128.57%

Step-by-step explanation:

The explanation is

Answer:

28.57%

Step-by-step explanation:

Answer:

1/2

Step-by-step explanation:

Answer:

4/40

Step-by-step explanation:

you can reduce this to 1/10

multiplying 4 by both 1 and 10 will give you the fraction 4/40 both can be divided by 4 and that's how it can reduce to the 1st fraction (1/10)

Answer:

x=-10, y=-20

Step-by-step explanation:

first you substiture the y in the second equation with the first

x-2x=10

then solve

1x-2x=-1

-x=10

multiply both sides by a negative to make the varible a

positive

x=-10

now we substitue the x in the first equation with -10

y=2(-10)

y=-20

Answer:

a = 69

Step-by-step explanation:

The linear pair equals 180 degrees.

a + 90 + 21 = 180

a + 111 = 180

a = 69

nice!

Answer:

A= 69 degrees

Step-by-step explanation:

if all those angles equal a total of 180 degrees then all you need to do is add the angles your given which in this case is 21 and a 90 degree angle which would equal 111 degrees, then subtract 111 from 180 and that would be the answer to the missing angle, which is 69 degrees.

21 + 90 = 111

180- 111 = 69

Answer:

60 milligrams

Step-by-step explanation:

just cross multiply! percentages are just fractions of 100. so you can say that [tex]\frac{45}{x} =\frac{75}{100}[/tex]

multiple 75 by x and 45 by 100 and you get

4500=75x

divide both sides by 75 and you get 60

Answer:

X = 2√41

Step-by-step explanation:

Uaing the pothagorean therom, (a squared plus b squared equals c squared) find the square of both 8 and 10 which are

8 squared - 64

10 squared - 100

Add them together to get

164

√164 = x

You can reduce that to 2√41

Answer:

d

Step-by-step explanation:

Answer:

hardhard

Step-by-step explanation:

Answer:

6028.8

Step-by-step explanation:

Answer:

v = 6028.8m³

Step-by-step explanation:

Cylinder volume formula:

πr²h

3.14*8²*30=6028.8m³

Answer: I don’t think I’m right but 53.33

Step-by-step explanation:

Answer:

b then a

Step-by-step explanation:

Answer:

m = 2

Step-by-step explanation:

Plug 2 coordinates into the slope formula

(y2-y1)/(x2-x1)

For this I will choose the first and third coordinates:

15-7/5-1 = 2

The slope is 2

Answer:

B

Step-by-step explanation:

Because its addition

Answer:

I'm pretty sure it's B). Additive identity Property.

Step-by-step explanation:

If it isn't let me know.

Answer:

c (6)

Step-by-step explanation:

by the corresponding angles postulate, the angle above 20x-5 will be 65°.

20x - 5 + 65 = 180 they are supplementary angles (angles that add up to 180°)

20x + 60 = 180

20x = 120

x = 6

Answer:

a = 4.5

b = 5

Step-by-step explanation:

Answer:

b=7

area=20

a=5.66

perimeter=19.66

Step-by-step explanation:

Don't know your exact question but here goes everything:

since angle between a and b=45 degrees, b=4+3

b=7

area=(7x4)-1/2(4)(4)

area=28-8

area=20

a^2=4^2+4^2

a^2=16+16

a^2=32

a=5.66

Answer:

10%

Step-by-step explanation:

moo

Answer: 18

Step-by-step explanation: The ratio 3:9 is equivalent to 1:3. This means that whatever number on the left side of the ratio should be multiplied by 3 to get the one on the right. 6 x 3 = 18.

The value of the unknown number for the fraction is equal to 18.

An ordered pair of numbers a and b, represented as a / b, is a ratio if b is not equal to 0. A proportion is an equation that sets two ratios at the same value. The numerical relationship between two values demonstrates how frequently one value contains or is contained within another.

Given that the ratio is 3:9 then the value of the unknown number will be calculated as,

The ratio 3:9 is equivalent to 1:3. This means that whatever number is on the left side of the ratio should be multiplied by 3 to get the one on the right.

The unknown number will be,

6 x 3 = 18.

Therefore, the value of the unknown number for the fraction is equal to 18.

To know more about ratios and proportions follow

https://brainly.com/question/2914376

#SPJ2

Answer: 3x+10

You welcome!