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AleksandrR [38]
3 years ago
7

PLEASE HELP PLEASE THANK U SO MUCH

Mathematics
1 answer:
arlik [135]3 years ago
4 0

Answer:

Step-by-step explanation:

x² - 7x - 18 = 0

Product = -18

Sum = -7

Factors = 2 , (-9)    {2*(-9) = -18  & 2 +(-9) = -7}

x²  + 2x - 9x - 18 = 0

x(x + 2) - 9(x + 2) = 0

(x +2)(x - 9)= 0

x + 2 = 0    ; x - 9 = 0

   x = -2     ; x  = 9

x = -2 , 9

Sale price = 272000

Reduction percentage = 15%

Let the original price = x

Reduction = 15% of x

Original price - reduction price = Sale price

x - 15% of x = £272000

x -\dfrac{15}{100}x = 272000\\\\\\\dfrac{100}{100}x-\dfrac{15}{100}x=272000\\\\\\\dfrac{85}{100}x=272000\\\\\\x=272000*\dfrac{100}{85}

x = 3200 * 100

Original price = £320000

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Answer:

one half or 1/2

Step-by-step explanation:

do your rise over your run on the graph.

7 0
4 years ago
Airplane X left the airport, flying at a rate of 400 miles per hour. Airplane Y left 2 hours later, flying at a rate of 450 mile
sergij07 [2.7K]

Answer:   i think it will take 48 hours

Step-by-step explanation:

here's how to get 48 so basically 450-400-2= 48

now if you end up doing 400 - 450 then you will get -50 if you do 400-450-2 you will get a -52 <u><em>so you want to make sure you do the biggest number first and then do the smaller numbers to get 48</em></u> like 450 - 400 - 2 and then you will have 48

i hope this helps!

5 0
3 years ago
.In which step below does a mistake first appear in
Dmitry [639]

Answer:

step 2

Step-by-step explanation:

from -8(a+6) to -80 - 48 is incorrect

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5 0
3 years ago
HELP!!!!!!!!!
ludmilkaskok [199]

D) 6x≥360; x≥60

Step-by-step explanation:

The goal is to save at least $350 over the next 6 weeks.

Let the amount to save per week be x

x *6 should be equal or more than the goal.This is

6x ≥ 360

However, dividing the goal amount by number of weeks to get the amount to save per week gives;

360/6 =60

so x≥ 60

The inequality is thus :  6x ≥360;x≥60

Learn More

Forming inequalities :brainly.com/question/2039740

Keywords : goal, save, inequality , weeks

#LearnwithBrainly

6 0
3 years ago
Can someone please help me on the second on please thanks:)
eimsori [14]
Since she spent $9.72 and deposited $9.72 her bank balance did not change at all. She basically paid off how much she spent on lunch on Wednesday.
7 0
3 years ago
Read 2 more answers
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