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3 years ago

Solve the system by substitution method: y = 6x-11 -2x - 3y = -7 show your work

Mathematics

2 answers:

Sedaia [141]3 years ago

4 0

i hate how we're forced to type something.

katovenus [111]3 years ago

4 0

Answer:

-2x-3(6x-11)=-7

-2x-18x+33=-7

-20x+33=-7

-20x=-40

x=2

y=6(2)-11

y=12-11

y=1

Step-by-step explanation:

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A bus travels 300 kilometers at a given speed. If the speed is increased by 5 kilometers per hour, the trip will be reduced by t

Margaret [11]

Answer:

25km/hr (take the word train as bus )

Step-by-step explanation:

Answer

Let x km/hr be the constant speed of the train,

Then Time taken to cover 300km=

300

hrs

Time taken to cover 300km when the speed is increased by 5km/hr=

x+5

300

hours

It is given that the time to cover 300km is reduced by 2 hours

∴

300

−

x+5

300

⇒

x(x+5)

300(x+5)−300x

=2⇒2x

+10x=1500

⇒x

+5x−750=0⇒x

+30x−25x−750=0

⇒(x+30)(x−25)=0⇒x=25orx=−30

But x cannot be negative. Therefore x=25

Hence, the original speed of the train is 25km/hr

3 0

3 years ago

The clothing company makes a profit of $2.3 million this is $4.1 million more than last year what was the profit last year

S_A_V [24]

Answer:

The profit earn by clothing company last year is - $1.8 million .

Step-by-step explanation:

Given as :

The profit earn by clothing company this year = $2.3 million

And The profit earn by clothing company this year = $4.1 million more than that of last year

Let The profit earn by clothing company last year = $A

<u>Now, According to questio</u>n

∵ profit earn by clothing company this year = $4.1 million more than that of last year

Or, profit earn by clothing company this year = $4.1 million + profit earn by clothing company last year

Or, $2.3 million = $4.1 million + $A

Or, A = $2.3 million - $4.1 million

Or, A = - $1.8 million

So,The profit earn by clothing company last year = A = - $1.8 million

Hence, The profit earn by clothing company last year is - $1.8 million . Answer

5 0

3 years ago

(08.06 MC)

const2013 [10]

Answer:

(3.5, 17)

Step-by-step explanation:

It would be nice to see the whole graph, so we can see where the functions cross.

Without that information, we can still eliminate unreasonable choices.

A) the quadratic at y=3.5 is well above the exponential

B) the most likely choice (3.5, 17)

C) at x=-8, the quadratic is above the exponential

D) neither graph goes anywhere near y = -8

8 0

4 years ago

Read 2 more answers

The school team has 80 swimmers. The ratio of seventh-grade swimmers to all swimmers is 5 : 16. Write a proportion that gives th

ElenaW [278]

<h2>(25) 7th Grade Swimmers</h2><h2>25:80</h2>

8 0

3 years ago

Please help me with this please.

natali 33 [55]

Answer:

f(-2) = -1

f(0) = -5

f(4) = -1

Step-by-step explanation:

The number inside of f( ) is telling you which equation to use to get the answer.

Example:

f(-2) since -2 is less than 0 you would use (x^2) - 5. So, ((-2)^2) - 5 = 4-5 = -1

f(0) since 0 is less than or equal to 0 you would use (x^2) - 5 again. So, ((0)^2) - 5 = 0-5 = -5

f(4) since 4 is grater than 3 you would use (2^(x-1)) - 9. So, (2^(4-1)) - 9 = -1

<u><em>The Graph, try to make it as straight as possible</em></u>

6 0

3 years ago