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2 years ago

Help me please this test is very important !

Mathematics

1 answer:

Lilit [14]2 years ago

6 0

Answer:

Step-by-step explanation:

5>2n+11

5-11>2n

-6>2n

-6/2>n

n<or equal to -3

bubble is filled pointing left

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Factorise x(squared) + 7x - 30

Sergeu [11.5K]

X^2+7x-30
what we do is we find what 2 number multiply to get -30 and add to get 7
factor 30
30=2 times 3 times 5
we know that is has to be negative eventually so one is negative and one is positivie so we do2 factors and add
2 times 5=10
10 and -3
add
10-3=7
checks
10 times -3=-30

so we put those in
(x-3)(x+10)
factored

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3 years ago

An electric train is moving north at 100mph and a wind is blowing to the west at 10mph. Which way does the smoke blow?

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2 years ago

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The perimeter of a triangle is 7a-11b . If two of its sides are 2a+b and a-9b, what is the third side?

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Answer:

4a plus or minus 1b

Step-by-step explanation:

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2 years ago

the ratio of country albums to jazz albums in a music collection is 2 : 3. If the music collection has 45 albums, how many are c

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2 years ago

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The play director spent 190 190190 hours preparing for a play. That time included attending 35 3535 rehearsals that took varying

sineoko [7]

Answer:

The equation $35x+93\frac{3}{4}=190$ gives average time spent on 35 rehearsals.

Step-by-step explanation:

Please consider the complete question.

The play director spent 190 hours preparing for a play. That time included attending 35 rehearsals that took varying amounts of time and spending $93\frac{3}{4}$ hours on other responsibilities related to the play. What question does the equation $35x+93\frac{3}{4}=190$ help answer?

Since time spent on each rehearsal is 35 hours, so time spent on 35 rehearsals would be $35x$ .

$93\frac{3}{4}$ hours is time spent on other responsibilities related to play. The sum of these times equals to total time spent on preparing the play.

Now let us solve our equation step by step.

$35x+\frac{375}{4}=190$

$35x=190-\frac{375}{4}$

$35x=\frac{760}{4}-\frac{375}{4}$

$35x=\frac{760-375}{4}$

$35x=\frac{385}{4}$

$35x=96.25$

Time spent on 35 rehearsals is 96.25 hours and we are told that each rehearsal took different amount of time. Dividing 96.25 by 35 we will get average time spent on each rehearsal.

Therefore, equation $35x+93\frac{3}{4}=190$ gives average time spent on 35 rehearsals.

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3 years ago