2 years ago

A train travels 91 kilometers in 2 hours, and then 97 kilometers in 3 hours. What is its average speed?

Mathematics

1 answer:

Andrei [34K]2 years ago

6 0

I think the average spend is 11 km. i don't know for sure..

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if you subtract 18 from my number and multipy the difference by -3 the result is -51 what is the number

NNADVOKAT [17]

Answer:

Step-by-step explanation:

x-18=y

y*-3=-51

y=17

x-18=17

17+18=x

x=35

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2 years ago

What is the answer <br> A<br> B<br> C<br> D

Jet001 [13]

What is the answer for what, please ask your question

7 0

3 years ago

Help please with #3

Alenkasestr [34]

Answer: x = 2a over b + c

Step-by-step explanation:

1. Multiply both sides by two. This cancels out 2 and turns a into 2a. It should look like 2a = bx + cx

2) Since both b and c have x’s, we turn it into (b + c)x

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2 years ago

Given that f(x) = x2 – 3x – 28 and g(x) = x - 7, find

gregori [183]

Answer:

$(f-g)(x)=x^2-4x-21$

Step-by-step explanation:

We are given the two functions:

$f(x)=x^2-3x-28\text{ and } g(x)=x-7$

And we want to find:

$(f-g)(x)$

This is equivalent to:

$=f(x)-g(x)$

Substitute:

$=(x^2-3x-28)-(x-7)$

Distribute:

$=x^2-3x-28-x+7$

Rearrange:

$=(x^2)+(-3x-x)+(-28+7)$

Hence:

$(f-g)(x)=x^2-4x-21$

6 0

2 years ago

The quotient of a number and -7 decreased by 2 is 10 find the number

yarga [219]

X/-7 -2 =10
x/-7 = 12
x = -84

7 0

2 years ago