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3 years ago

PLS HELP

1 answer:

8 0

There is 3600 seconds per hour.
Multiply the speed per second by 3600 to get the speed in miles per hour then convert to kilometer/hour.

4.9 * 3600 = 17,640 miles per hour

17,640 x 1.6 = 28,224 kilometers per hour

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Please help! i'm not really good at these, thank u sm if u help!

Archy [21]

Answer:

Correct: a, b, c, d, f, g, h, i, l

Incorrect: e, j, k

Step-by-step explanation:

a. -120=60(-2) {insert x and y into the equation and see if it works} Correct

b. 60 is being multiplied by hours, so it is the mph Correct

c. 60 is always the one being multiplied, so it's the constant Correct

d. 210=60(3.5) {insert 3.5 as x [cause hours] and see if it equals 210 [it does]} Correct

e. y is the dependent variable, and it represent miles driven Incorrect

f. Direct variation equation is y=kx {in the equation, k=60} Correct

g. x is the independent variable, and it represents the hours driven Correct

h. The x and the y are proportional Correct

i. y is the dependent variable, and it represent miles driven Correct

j. y is the dependent variable, and it represent miles driven Incorrect

k. Rise=y Run=x The first point would be (1,60) {rise=60 run=1} Incorrect

l. (0,0) is a solution, and it is also the y-intercept Correct

(hope this helps :P)

8 0

3 years ago

What can you say about the y values?

lbvjy [14]

The minimum value of g(x) is -3. This is a parabola with minimum value of -3 when x = 0.

f(x) will approach the values of -3 when x approaches negative infinity but will never reach that value

So b and d are true

8 0

3 years ago

Find the equation of a line passing through a point (3,5) and perpendicular to the line joining the points (3, 7) and (7, -1)

eduard

Step-by-step explanation:

we start first by finding the gradient of the line

change in y/change in x

7-(-1)/3-7=8/-4

=-2

then for perpendicular lines m1m2=-1

therefore to find the gradient of that line

-2m2=-1

therefore m2=2

so therefore

y-5/x-3=2

so y-5=2x-6

y-2x=-1

in the form y= mx +c

then y=2x-1

7 0

2 years ago

lev buys a drink of $3.05 and a slice of a pizza for $5.40 he now has $12.37 let how much money did teddy have to begin with

yan [13]

Answer:

12.37 + 5.40 + 3.05 = $20.82

7 0

4 years ago

I need help with this question of geometry

katrin2010 [14]

A)

Since we're dealing with an isoseles triangle you know that the bottom two angles are congruent (A&B).
Also you know that line CM creates a midpoint in line AB and also biscects angle C. There you have all three angles so D is out along with B. Now to Illiminate C we know that line CM is shared so that's one side, because line CM creates a mid point in line AB lines AM and BM are congruent so that's the second side and if we look at the triangle as one isoseles again we know that the two upper sides are congruent, that's the last side to illiminate C. Leaving us with A, the dont give us any measurements so you aren't able to look at the heights and lengths.

8 0

4 years ago