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oksian1 [2.3K]
2 years ago
7

Please help me with 1,2,3,4,5,6,7,8,9 tell me how u get it and the answer please I really need help

Mathematics
1 answer:
NNADVOKAT [17]2 years ago
8 0

Answer:

1) x = 15

Step-by-step explanation:

We use the Pythagorean thm for these questions. Where a and b are the legs (So order doesn't matter), and where c is the hypotenuse

1)

a² + b² = c²

9² + 12² = x²

81 + 144 = x²

x² = 225

You square root each side so you can get rid of the exponent on x.

\sqrt{x^2} =\sqrt{225}

x = 15

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Please help me with this!
stich3 [128]

Answer:

y = x^2 - 4x - 6.

Step-by-step explanation:

The roots are  2 + √10 and 2 - √10, so in factor form we have:

(x -  (2 + √10))(x - (2 - √10))

= ( x -  2 - √10)(x - 2 + √10)

= x^2 - 2x + √10x - 2x + 4 - 2√10 - √10x  + 2√10 - √100

=  x^2 -4x + 4 - 10

= x^2 - 4x - 6.

7 0
3 years ago
Plzzzzz help asap if i don't get it in like 10 mins the whole thing will restart
Sergio [31]

Answer:

I am going to assume the 25 is 25%

Step-by-step explanation:

25/100 *212

1/4*212=53

53 acres of land is carrots

4 0
3 years ago
I need help please! <br> ​ 3/10×(−4/5)
Tems11 [23]
-0.24 should be the answer. idk i might be wrong. im not to great at math just i just used a calculator
6 0
3 years ago
Read 2 more answers
Nov 09, 17:58:28 AM
Marianna [84]
The percent discount is 30%.
If you multiply $32 by .30, you will get $9.60. That is the amount of the discount. If you subtract $9.60 from $32, you will get $22.40 which is what he paid before tax. Therefore the percent discount is 30%.
7 0
3 years ago
Find the volume of the object 5ft 12ft pretty easy!
Volgvan

Answer:

V=75pi ft^3 or 235.619 ft^3

Step-by-step explanation:

area of base times length

area of circle = pi * r^2  where r = 1/2 * diameter

A = pi * 2.5^2

A= 6.25pi ft^2

multiply by length

V= 6.25pi*12

V=75 pi

5 0
2 years ago
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