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3 years ago

7 less than a number is 20

Mathematics

2 answers:

Shalnov [3]3 years ago

5 0

Answer:

x-7=20

Step-by-step explanation:

the equation would be written like it it above ^

the answer would be x=27

sesenic [268]3 years ago

4 0

Answer:

7 - x = 20 hope this helps!!

Step-by-step explanation:

can Iget brainliest?? ;P

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Please help me solve

Irina18 [472]

If the area of a rectangle is width time length, then we have all of the info we need.

the width is 6 less than 3 times the length. let the length be x and put your words into math! 6 less is -6. 3 times a number is 3x, so width=3x-6.

so we have area=l×w which becomes x×(3x-6)=105

solve
$x(3x - 6) = 105 \\ 3 {x}^{2} - 6x = 105 \\ 3( {x}^{2} - 2x) = 105 \\ \frac{1}{3} \times 3( {x }^{2} - 2x) = 105 \times \frac{1}{3} \\ {x}^{2} - 2x = 35 \\ {x}^{2} - 2x - 35 = 0$
factor and solve!

you will get one positive and one negative. pick the positive since lengths cannot be negative

7 0

3 years ago

What is 37/100 as a simplified fraction???

ratelena [41]

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3 years ago

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Taya2010 [7]

Answer:

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Step-by-step explanation:

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3 years ago

What are the zeros of the function f(x) = x4 – 4x² –5?

goblinko [34]

Answer:

$x =i\\\\x =-i\\\\x=\sqrt 5\\\\x=-\sqrt 5$

Step-by-step explanation:

$~~~~~~~~x^4-4x^2 -5 = 0\\\\\implies x^4-5x^2+x^2 -5 = 0\\ \\\implies x^2(x^2 -5)+(x^2-5) =0\\ \\\implies (x^2 +1)(x^2 -5) - 0\\\\\implies x^2+1 = 0~~~~~~~~~ \text{Or}~~~~~~~~~ x^2 -5 = 0\\\\\implies x^2 = -1~~~~~~~~~~~~ \text{Or}~~~~~~~~~x^2 = 5\\\\\implies x= \pm\sqrt{-1}~~~~~~~~~\text{Or}~~~~~~~~~x=\pm\sqrt 5\\\\\implies x = \pm i~~~~~~~~~~~~~~\text{Or}~~~~~~~~~x=\pm\sqrt 5\\$

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2 years ago

<img src="https://tex.z-dn.net/?f=-%5Cfrac%7B1%7D%7B3%7D%20xz%28-9xy%2B15yz%29%2B3x%5E%7B2%7D%20%282yz%5E%7B2%7D%20-yz%29" id="T

fgiga [73]

( 6^2yz^2-5xyz^2 ) is the awnser

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3 years ago