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viva [34]
3 years ago
13

If y varies directly as x, and y = 15 as x = -3, find y for the x-value of 4.

Mathematics
1 answer:
NeX [460]3 years ago
3 0
Y = kx
15 = -3k
k = -5

so if x = 4
y = kx
y = (-5) (4) = - 20

answer

<span>y = -20 when the x = 4.</span>


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Kevin needs to convert 620 millimeters per minute to meters per hour. Which conversion factors should he use?
Annette [7]
Try this option:
1 meter=1000 mm; 1 hour=60 min. From another side: 1 mm=0.001 m. and 1 min=1/60 h.
Using this rule:
620 mm/h=0.06*620 m/h=37.2 meters per hour.

answer: 0.06
7 0
3 years ago
There are 12 boys in a math class. The total number of students s depends on the number of girls in the class g. write an equati
Pani-rosa [81]
12 + g = s
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3 years ago
What is m∠KNL? Enter your answer in the box. ° A horizontal line segment M K intersects with line segment J L at their midpoint
inna [77]

t N.

In the figure shown below

Answer:

A horizontal line segment M K intersects with line segment J L at their midpoint N.

∠J N M =(5x+2)°

∠ LN M=3( x+ 14)°

So, ∠J N M + ∠ LN M =180°[ These two angles form linear pair.Angles forming linear pair are supplementary.]

⇒5 x+ 2+ 3 (x+ 14) =180 [ By Substitution]

⇒ 5 x+2 +3 x+42°= 180°

⇒ 8 x=180°-44°

⇒8 x= 136°

⇒x= 136°÷8

⇒x=17°

So, ∠J N M =5×17 +2=87°

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∠J N M =∠K N L [Vertically opposite angles]

∠K N L=87°


8 0
3 years ago
Read 2 more answers
Given the proportional steel cost, how much do 200 pounds of steel cost?
kotegsom [21]

Answer:

Your answer is B, 150

Step-by-step explanation:

If we look at the chart it says 160 pounds of steel is 120, so for example if we start from 40 we will have 30, so every time we add 40 pounds 30$ are added, meaning that 160+40=200, 120+30= 150, Thus B or 150 is our answer.

3 0
2 years ago
Read 2 more answers
Can u guys PLEASE answer this question ASAP. A line passes through the point (2,4) and has a gradient 2. Find the y-coordinate o
Veseljchak [2.6K]

y=2

Step-by-step explanation:

Make an equation of straight line by using the formula :y= mx+c

put the x-value of point (2,4) which is 2 and the gradient,m which is 2 into the straight line equation:

y=2x +c

So you need to find the y-intercept to complete the equation, therefore:

when y=0,

0=2(2)+c

c=-4

next the question ask to find the y-coordinate when x =3, therefore you just need to replace x in the equation with 3:

y=2(3)-4

y=4

7 0
3 years ago
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