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Darina [25.2K]
3 years ago
15

X squared + 2x - 15 = 0

Mathematics
2 answers:
stiks02 [169]3 years ago
6 0

Answer:

Step-by-step explanation:

x=−5 or x=3

Explanation:

   the factors of - 15 which sum to + 2 are + 5 and - 3

   ⇒(x+5)(x−3)=0

   equate each factor to zero and solve for x

   x+5=0⇒x=−5

   x−3=0⇒x=3

KatRina [158]3 years ago
3 0

Answer:

3 or -5

Step-by-step explanation:

x^2 + 2x - 15 = 0

To solve this you need to factorise:

(x + 5) (x - 3) = 0

Now find the x value for each of these brackets

(x + 5) = 0 or (x - 3) = 0

x = -5 or x = 3

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Ben has $100 to go shopping. Does he have enough money to buy a $20 and a $72 pair of shoes if there is an 8.5% tax
Juli2301 [7.4K]

So, we first add the 20 and 72 together and you will get 92.

What I like to do next is usually 92/100x8.5. The tax would be then 7.82

92 + 7.82 = 99.82 < 100

The answer is yes.

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3 years ago
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r-ruslan [8.4K]
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6 0
3 years ago
Ratio And Proportion
Allushta [10]

Answer:

11200 for 7 engines for a total of 80 hours

Step-by-step explanation:

You have 8 engines burning 12000 .for 10 hours.

Divide 10 hours into 12000=1200 PER hour.

1200 ÷8 engines = 140 per hour per engine.

140 × # of hours (12)=1680 for 12 hours per engine.

# of engines × 1680 for 12 hour/per engine

5×1680 = 8400 of fuel for 12 hours/5 engine

Then you have 2 that runs 10 hours

2 × 140 per hour per engine =280 × 10 =2800 for 2 engines for 10 hours

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4 0
3 years ago
HELP PLS GUYS ANYONE PLSSSSSS-h
7nadin3 [17]

Answer:

1 5/24

Step-by-step explanation:

5/6 + 3/8

LCM of 6&8=24

(5/6)*4 =20/24

(3/8)*3=9/24

20+9/24= 29/24

QRD(Quotuient,Reminder,Divisor)

= 1 5/24

B.

6 0
3 years ago
Read 2 more answers
If g(x)=x+1/x-2 and h(x)=4-x what is the value of (g•h)(-3)
djyliett [7]

The Answers is


g(x) = (x + 1)/(x - 2)

h(x) = 4 - x


g(h(x)) = (4 - x + 1)/(4 - x - 2) = (5 - x)/(2 - x)


g(h(-3)) = (5 - (-3))/(2 - (-3)) = (5 + 3)/(2 + 3) = 8/5


g(h(-3)) = 8/5.

3 0
3 years ago
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