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2 years ago

13. which equation has no solution ?

Mathematics

2 answers:

Tresset [83]2 years ago

8 0

a) 8 -5v-3 = 5v-5

-5v+5 = 5v-5

identity

b) 3m-6 =4m+7

has 1 solution

c) 2w +4 = 5w -2w +4

2w+4 = 3w+4

w=0

one solution

d) 7y+9 = 7y-6

subtract 7y from each side

9=-6 impossible

no solution

Choice D

Lana71 [14]2 years ago

8 0

The answer is letter D

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Find the perimeter of WXYZ. Round to the nearest tenth if necessary.

yanalaym [24]

Answer:

C. 15.6

Step-by-step explanation:

Perimeter of WXYZ = WX + XY + YZ + ZW

Use the distance formula, $d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$ to calculate the length of each segment.

✔️Distance between W(-1, 1) and X(1, 2):

Let,

$W(-1, 1) = (x_1, y_1)$

$X(1, 2) = (x_2, y_2)$

Plug in the values

$WX = \sqrt{(1 - (-1))^2 + (2 - 1)^2}$

$WX = \sqrt{(2)^2 + (1)^2}$

$WX = \sqrt{4 + 1}$

$WX = \sqrt{5}$

$WX = 2.24$

✔️Distance between X(1, 2) and Y(2, -4)

Let,

$X(1, 2) = (x_1, y_1)$

$Y(2, -4) = (x_2, y_2)$

Plug in the values

$XY = \sqrt{(2 - 1)^2 + (-4 - 2)^2}$

$XY = \sqrt{(1)^2 + (-6)^2}$

$XY = \sqrt{1 + 36}$

$XY = \sqrt{37}$

$XY = 6.08$

✔️Distance between Y(2, -4) and Z(-2, -1)

Let,

$Y(2, -4) = (x_1, y_1)$

$Z(-2, -1) = (x_2, y_2)$

Plug in the values

$YZ = \sqrt{(-2 - 2)^2 + (-1 -(-4))^2}$

$YZ = \sqrt{(-4)^2 + (3)^2}$

$YZ = \sqrt{16 + 9}$

$YZ = \sqrt{25}$

$YZ = 5$

✔️Distance between Z(-2, -1) and W(-1, 1)

Let,

$Z(-2, -1) = (x_1, y_1)$

$W(-1, 1) = (x_2, y_2)$

Plug in the values

$ZW = \sqrt{(-1 -(-2))^2 + (1 - (-1))^2}$

$ZW = \sqrt{(1)^2 + (2)^2}$

$ZW = \sqrt{1 + 4}$

$ZW = \sqrt{5}$

$ZW = 2.24$

✅Perimeter = 2.24 + 6.08 + 5 + 2.24 = 15.56

≈ 15.6

5 0

2 years ago

1. A limited-edition soccer ball costs $30, and the sales tax is 6%. What is the total cost?

ra1l [238]

Answer:

$31.80

Step-by-step explanation:

The ball will cost 100% of its price plus 6% of its price for a total of 106%.

To use percentages as a factor and multiply, they must be divide by 100, making the multiplication factor version of 106% 1.06.

Multiply the cost of the ball by your multiplication factor:

30 x 1.06 = 31.8

Money is written to two decimal places, making your answer $31.80

6 0

2 years ago

Read 2 more answers

Which multimedia sources are best for a student writing a research paper on childhood obesity? Check all that apply.

seropon [69]

Answer:

The answer is 1&2

Step-by-step explanation:

1.) and documentary is one of the best resource if you have nothing. but if all else fails talk to a doctor they will help you.

Hope this helps :) :) :) :)

7 0

2 years ago

Read 2 more answers

2. 3х - бу = 18 4. How do you solve for y

Gnoma [55]

Answer:

$y = - 3 + \frac{1}{2} xxer$

Step-by-step explanation:

move variable to the right-hand side and change its sign

$- 6y = 18 - 3x$

divide both sides of the equation

$y = 3 + \frac{1}{2} x$

8 0

2 years ago

will give brainliest to the person with the most detailed answer. That means tell me how you got ur answer. And the person who a

-BARSIC- [3]

Answer:

See below

Step-by-step explanation:

Question 7

The rate of change in Health Club A is 12 as given in slope-intercept form
The rate of change in Health Club B is 21 as given by an increase of $21 per month
The rate of change in Health Club C is 15 as given by (70-40)/(3-1)=15
The rate of change in Health Club D is 20 as given by "$20 each month for x months"
Therefore, Health Club B has the greatest rate of change of $21 per month

Question 8:

The initial value of Health Club A is 60 as given in slope-intercept form
The initial value of Health Club B is 0 as given by $0 for 0 months
The initial value of Health Club C is 25 as given by y=mx+b --> 40=15(1)+b --> b=25
The initial value of Health Club D is 20 as given by "A customer pays a one-time fee of $20"
Therefore, Health Club A has the greatest initial value (or y-intercept) of $60

4 0

1 year ago