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julia-pushkina [17]

3 years ago

15

Two trains leave stations 304 miles apart at the same time and travel toward each other. one train travels 85 miles per hour whi

le the other travels at 105 miles per hour. How long will it take for the two trains to meet

1 answer:

lukranit [14]3 years ago

7 0

Answer:

22min

Step-by-step explanation:

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Given P(1,3) and Q(3,7) what is the slope of PQ

Aleksandr [31]

Answer:

hi! you have 2 points! this means slope formula! y2-y1/x2-x1

okay all you do now is plugin! (x1 1,y1 3) (x2 3,y2 7) what I did was label your x1 y1 x2 y2! now just follow the formula and that / is division or basically a fraction

7-3/3-1

that equals -5! and that's your slope! memorize the formula it helpss!

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3 years ago

The graph of a function must be linear if it has what characteristic?

pantera1 [17]

The graph of a function is linear of the graph is a straight line.

3 0

4 years ago

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When adding the numbers 4+9+7+6+3 you can make one group of 10.True or False

Keith_Richards [23]

Answer:

false

Step-by-step explanation:

6 0

3 years ago

100 POINTS HELP ASAP Linear Combination

notka56 [123]

Answer:

1) $x=\dfrac12$

2) $n = -3 \ \ \textsf{and} \ \ m = -4$

3) see below

4) A: 0 = 1

Step-by-step explanation:

<u>Question 1</u>

$15-0.5(4x-2)+4x=17$

$\implies 15-2x+1+4x=17$

$\implies 2x+16=17$

$\implies 2x=1$

$\implies x=\dfrac12$

<u>Question 2</u>

$\textsf{rearrange} \ n=m+1 :$

$\implies -m=-n+1$

$\textsf{add equations} \ -m=-n+1 \ \textsf{and} \ m=2n+2:\\$

$\implies0=n+3$

$\implies n=-3$

$\textsf{substitute} \ \ n=-3 \ \ \textsf{into} \ \ m=n-1:$

$\implies m=-3-1$

$\implies m=-4$

<u>Question 3</u>

subtract the second equation from the first

divide both sides by -4

substitute found value for y into first equation

solve for x

<u>Question 4</u>

$3j=k$

$k=3j+1$

$\textsf{rearrange} \ 3j=k :$

$\implies -k=-3j$

$\textsf{add equations}\ -k=-3j \ \ \textsf{and}\ \ k=3j+1:$

$\implies 0=1$

Solution = A

6 0

3 years ago

36. The average height of two cupboards is 1.5 metres. If cupboard B's height

Debora [2.8K]

Answer:

2m

Step-by-step explanation:

2 * 1.5 = 3, the total height

we know that there are three metres total and 1 is half the other, so we divide 3m by 3 = 1m, the height of B,

as A = 2B, A = 2m

4 0

3 years ago