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Yuri [45]
3 years ago
9

What is the answer to this

Mathematics
2 answers:
Maurinko [17]3 years ago
5 0

{x}^{2}  - 9x - 36 = 0 \\ (x - 12)(x + 3) = 0 \\ x - 12 = 0 \\ x = 12 \\ x  + 3 = 0 \\ x =  - 3
Elden [556K]3 years ago
3 0
X^2 - 9x - 36 = 0

Note that one possible set of factors is (x-12)(x+3).  Why?  Because (-12)(3) = -36 and -12x + 3x = -9x.
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How many kilometres on the ground is represented by 9 cm on the map?
Aloiza [94]

Answer:

22500

Step-by-step explanation:

You have to multiply 9 by 25000.

3 0
2 years ago
When making a fruit salad, a chef chooses 7 fruits from 10 that are in season. how many different fruit salads can the chef crea
Furkat [3]
For this example, we must combine not permutate; this because a salad in which you first use apple then tomato is the same as the one in which you use first tomato then apple, so order does not matter.

Me must do "10 combine 7" which is written by the binomial coefficient (_{7} ^{10}); in general a binomial coefficient is written by:
(_{k} ^{n})= \frac{n!}{k!(n-k)!}

In which n and k are positive integers, such that n\ \textgreater \ k.

So, for this problem:
(_{7} ^{10})= \frac{10!}{7!(10-7)!}=\frac{10!}{7!3!}= \frac{10*9*8}{3*2}=10*3*4=120

Hence, there are 120 different ways to make the fruit salad.
5 0
2 years ago
Can someone answer this question please WBA’s wee it correctly if it’s correct I will mark you brainliest
oksano4ka [1.4K]

Answer:

\frac{1}{6}*\frac{4}{13}

Step-by-step explanation:

A 6 sided die has 6 outcomes.

Your sister picks from a 13 - slice plate meaning the fact that there are 13 outcomes.

There are 4 yellow slices so picking a yellow slice has a \frac{4}{13} chance

You need to mutiply both displayed values to solve this problem.

\frac{1}{6}*\frac{4}{13}

6 0
3 years ago
Jorge received a 3.1% increase in his pay at work. If he now makes $18.00 per hour, how much was he making before his raise? (Ro
g100num [7]
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2 years ago
5y/1 / 1/3 = y−0.9/0.2 Please solve this to find y!
r-ruslan [8.4K]

The answer is y= -1.63:

8 0
3 years ago
Read 2 more answers
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