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3 years ago

(b) 33 is 75% of what number?

Mathematics

2 answers:

miskamm [114]3 years ago

8 0

Your answer should be 44 lol

trasher [3.6K]3 years ago

8 0

The answer is 44.
hope this helps youuuu

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Divide 72 in a ratio of 1:3:5

likoan [24]

<span>1+3+5 = 9

72/9 = 8

1 x 8 = 8
3 x 8 = 24
5 x 8 = 40

</span><span>72 in a ratio of 1:3:5 = 8:24:40</span>

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3 years ago

Evaluate f(x) = –x2 – 4 for x = –3.

melisa1 [442]

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3 years ago

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What is the lateral area of a rectangular prism with length of 4in width of 5in and height of 15in

pav-90 [236]

300 cubic in. I think

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3 years ago

Solve the simultaneous equation 2x+5y=6 and 5x-2y=9

Ilia_Sergeevich [38]

Answer:

$x = \frac{57}{29} \ , \ y = \frac{12}{29}$

Step-by-step explanation:

2x + 5y = 6 --------( 1 )

5x - 2y = 9 --------( 2 )

_____________

( 1 ) x 5 => 10x + 25y = 30 -----------( 3 )

( 2 ) x 2 => 10x - 4y = 18 ----------- ( 4 )

______________

( 3 ) - ( 4 ) => 0 + 29y = 12

$y = \frac{12}{29}$

Substitute y in ( 1 ) =>

$2x + (5 \times \frac{12}{29}) = 6\\\\2x + \frac{60}{29} = 6\\\\2x = 6 - \frac{60}{29}\\\\2x = \frac{174 - 60}{29}\\\\x = \frac{114}{29 \times 2}\\\\x = \frac{57}{29}$

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3 years ago

Use the discriminant to describe the roots of each equation. Then select the best description.

zhuklara [117]

◆ QUADRATIC RESOLUTIONS ◆

$given \: \: equation \: \: - \\ \\ 3 {x}^{2} +7x - 2 = 0 \\ \\ here \: a = 3 \: \: , \: \: b = 7 \: , \: \: c = - 2 \\ therefore \: \: , \\ discriminant \: = {b}^{2} - 4ac = 7 3 \\ \\ using \: quadratic \: formula \: \: , \\ \\ x = \frac{ - b + \sqrt{d} }{2a} = \frac{ - 7 + \sqrt{73} }{6} \: \: \: \: \: ans.\\ \\ also \: \: , \\ \\ x = \frac{ - b - \sqrt{d} }{2a} = \frac{ - 7 - \sqrt{73} }{6} \: \: \: \: \: \: ans.$

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3 years ago