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Rashid [163]
3 years ago
13

Please helpppp Extra points and brainleist

Mathematics
1 answer:
vladimir1956 [14]3 years ago
5 0

Answer:

B

Step-by-step explanation:

x² - 4x - 7 = 0

(x - 2)² = 11

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How to do linear equations 27, 28,28,30
Mekhanik [1.2K]
#27.  
First cross multiply
2 (2a-3) = 3 (a-1)
next use the distribute property on both sides
4a - 6 = 3a - 3
combine like terms, subtract 3a from both sides and add 6 to both sides
a = 3

#28
cross multiply
3x = 4, then divide both sides by 3
x = 4/3

#30
add 1/4 to both sides
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6 0
3 years ago
I need help ASAP. Thank you
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8 0
3 years ago
PLZ HELP I GIVE BRAINLIEST...<br><br> 2-(-4)=?<br> -5-(10)=?
disa [49]

2 -(-4) = 2 + 4 = 6

-5-(10) = -5 - 10 = -15

I hope it helps you

5 0
3 years ago
Read 2 more answers
Help me out , plzzzzz!!
natta225 [31]

Answer:

a. 5,040 ways

b. 210 ways

Step-by-step explanation:

a) We want to pick 4 numbers out of 10 given that orders matter

If orders do matter, it will be a permutation problem

Mathematically;

n P r = n!/(n-r)!

In this case, n is 10 and r is 4

Thus, we have it that;

10 P 4 = 10!/(10-4)! = 5,040

b) if orders do not matter

It will be a combination problem

n C r = n!/(n-r)!r!

n = 10 and r = 4

10 C 4 = 10! /(10-4)!4!

= 210

3 0
2 years ago
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