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mart [117]
3 years ago
5

What is the slope of a line that is perpendicular to the line represented by the equation y=-2/5x+4/5

Mathematics
1 answer:
enot [183]3 years ago
6 0

Answer:

\frac{5}{2}

Step-by-step explanation:

recall for a line whose equation is

y = mx + b,

the slope of this line is m

the slope of a line that is perpendicular to this line is -\frac{1}{m}

in this case,

m = -\frac{2}{5}

hence -\frac{1}{m}=\frac{5}{2}

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Which expression does not belong with the other three? Explain your reasoning. 8 = x —2 3 = x ÷ 4 x − 6 = 5 x —3 = 9
Scorpion4ik [409]

Answer:

  • 3 = x ÷ 4

Step-by-step explanation:

<u>Given expressions:</u>

  • 8 = x - 2 ⇒ x = 8 + 2= 10
  • 3 = x ÷ 4  ⇒ x = 3*4 = 12
  • x - 6 = 5  ⇒ x = 5 + 6 = 11
  • x - 3 = 9  ⇒ x = 9 + 3 = 12

3 of them involves addition, one of them - multiplication

The second expression doesn't belong

4 0
3 years ago
A. Use substitution and show work
Alja [10]
A) 2x -3(3x -7) = 7 . . . . substitute for y
.. -7x = -14 . . . . . . . . . . . subtract 21
.. x = 2 . . . . . . . . . . . . . divide by -7
.. y = 3*2 -7 = -1 . . . . . . substitute for x
(x, y) = (2, -1)


B) 5(5x -2y) -2(3x -5y) = 5(8) -2(1) . . . . subtract 2 times 2nd equation from 5 times 1st
.. 19x = 38 . . . . simplify
.. x = 2 . . . . . . . divide by 19
.. y = (5x -8)/2 = 1 . . . . solve 1st equation for y, substitute x
(x, y) = (2, 1)


C) See the first graph.
(x, y) = (-4, 1)


D) See the second graph.
(x, y) = (3, 2)

6 0
3 years ago
Y−5x=3 solve for y please
Korvikt [17]

Answer: INDEiAaaaaaaaaaaaaaaa

4 0
2 years ago
Read 2 more answers
Y=3x−4<br> y=−12x+3<br> solution <br> solve by graphing
Anna11 [10]

Answer:

(7/15,−13/5)

Equation Form:

x=7/15,y=−13/5

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

7 0
2 years ago
Jacob consumes an energy drink that contains caffeine. After consuming the energy drink, the amount of caffeine in Jacob's body
sasho [114]

Answer: 0.87400mg of caffeine.

Step-by-step explanation:

You have

N(t)=N0(e^−rt)(1)

as a general Exponential decay equation where N0 is the amount at t=0, N(t) is the amount remaining at time t and r is the exponential decay constant. You're specifically given that after 10 hours, the decay factor is 0.2601, i.e.,

N(10)/N(0)=N0(e^−10r)/N0(e^0)= e^−10r=0.2601 . .(2)

Taking the last 2 parts of (2) to the power of 0.1t gives

e^−rt=0.2601^.1t . .(3)

This means that

N(t)=N0(e^−rt)=N0(0.2601^.1t). .(4)

Also,

N(2.56)N(1.56)=N0(0.2601.1(2.56))N0(0.2601.1(1.56))=0.2601.1(2.56−1.56)=0.2601^.1

= 0.87400mg of caffeine.

6 0
3 years ago
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