Please help this is due in an hour

Answers

Answer 1

Answer:

Answer:

B: Not proportional

Step-by-step explanation:

This wouldn't be proportional because for you, you are making 22 heartbeats in 20 seconds and 22-20 is 2. But if you look at your friend, he/she is doing 18 heartbeats in 15 seconds so add 5 so that 23 heartbeats is happening in 20 seconds and 23-20 is 3. If we compare, 3 is not the same as 2 making it not proportional.

Answer 2

Answer:

Answer:

Not proportional

Step-by-step explanation:

22/20 does not equal 18/15.

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How would i do this problem
slope= -2, y-intercept = 7

Answers

SINCE the slope is -2 it would be like this -2/1 but first plot the y-intercept onto the graph and go down 2 and over 1.

the equation of the line is
y=mx+c
y=-2x+7

Est. Length: Est. Length: 0:2000Time Taken: 000:48Emalee Welsh: Attempt 1Questions What is the solution to the system of equations?0 of 5 questions savedUse the linear combination method.Page 1:1 2 3 4 5Legendsaved Response8)Unsaved ResponseInfo Item(-2, 12)Quiz Status(0,2)Quiz Started(-3, 17)

Answers

5x + y = 2
4x + y = 4

5x + y = 2
-(4x + y = 4)

5x + y = 2
-4x - y = -4
x = -2

x = -2

5x + y = 2
5(-2) + y = 2
-10 + y = 2
y = 2 + 10
y = 12

x = - 2
4x + y = 4
4(-2) + y = 4
-8 + y = 4
y = 4 + 8
y = 12

x = -2 ; y = 12 ⇒ (-2,12)

PLEASE HELP 15 POINTSAn item costs $420 before tax, and the sales tax is $16.80 .
Find the sales tax rate. Write your answer as a percentage.

Answers

Answer:

The sales tax is 4%

Step-by-step explanation:

hope this helps plz mark brainliest

X-y+z=-4

3x+2y-z=5

-2x+3y-z=15

How do I solve this?

Answers

$1)\ \ \ x-y+z=-4\ \ \ \Rightarrow\ \ \ z=-4-x+y\n\n2)\ \ \ 3x+2y-z=5 \n.\ \ \ \ \Rightarrow\ \ 3x+2y-(-4-x+y)=5 \n.\ \ \ \ \Rightarrow\ \ 3x+2y+4+x-y=5 \n.\ \ \ \ \Rightarrow\ \ 4x+y=1\n\n3)\ \ \ -2x+3y-z=15\n.\ \ \ \ \Rightarrow\ \ -2x+3y-(-4-x+y)=15\n.\ \ \ \ \Rightarrow\ \ -2x+3y+4+x-y=15\n.\ \ \ \ \Rightarrow\ \ -x+2y=11\n--------------------\n$

$z=-4-x+y\n.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ and\n \left \{ {{4x+y=1\ \ \ \ } \atop {-x+2y=11\ /\cdot4}} \right. \n\n\left \{ {{4x+y=1\ \ \ \ } \atop {-4x+8y=44}} \right. \n-------\ny+8y=1+44\n9y=45\ /:9\ny=5\n\n-x+2y=11\ \ \ \Rightarrow\ \ \ x=2y-11\ \ \ \Rightarrow\ \ \ x=2\cdot5-11=-1\n\nz=-4-x+y=-4-(-1)+5=-4+1+5=2\n\nAns.\ x=-1\ \ \ and\ \ \ y=5\ \ \ and\ \ \ z=2$

What is 0.05 percent of 6.5?

Answers

$(0.05)/(6.5)*100\%=(5)/(6.5)\%= (1)/(13)\%\approx0,077%$

Answer:

I believe it is 0.325

Step-by-step explanation:

0.05 x 6.5 = 0.325

What is the solution to the following inequality?
-82 ≤ 5v + 3

Answers

Answer:

v ≥ -17

Step-by-step explanation:

-82 ≤ 5v + 3

-82 - 3 ≤ 5v

5v ≥ -85

v ≥ -17