The difference between two times a number and 18 is 8(in algebraic form)

Mathematics

2 answers:

melomori [17]3 years ago

5 0

I believe the correct answer is 2x-18=8

borishaifa [10]3 years ago

4 0

Answer:

2n - 18 = 8

Step-by-step explanation:

Difference means subtraction.

Times means multiplication.

is means equal.

Let "n" be the number.

2n - 18 = 8

Best of Luck!

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Answer:

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3 years ago

What is -11 2/3 x (-4 1/5) = ?

adelina 88 [10]

Answer:

Step-by-step explanation:

-11 2/3 x (-4 1/5) =

negative times negative = positive

Change the mixed numerals into fractions.

= 35/3 × 21/5

Multiply the numerators together. Multiply the denominators together.

= (35 × 21)/(3 × 5)

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= (7 × 5 × 7 × 3)/(3 × 5)

Divide the numerator and denominator by 3 and by 5.

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3 years ago

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IRISSAK [1]

Answer:

<h2>The x-interecepts are 5.6 and -1.4, approximately.</h2>

Step-by-step explanation:

The given equation is

$5x^{2} -21x=39$

Where $a=5$ , $b=-21$ and $c=39$ , let's use the quadratic formula

$x_{1,2}=\frac{-b(+-)\sqrt{b^{2}-4ac } }{2a} =\frac{-(-21) (+-)\sqrt{(-21)^{2} -4(5)(-39)} }{2(5)}\\ x_{1,2}=\frac{21(+-)\sqrt{441+780} }{10}=\frac{21(+-35)}{10}\\x_{1}=\frac{21+35}{10}=\frac{56}{10} \approx 5.6\\ x_{2}=\frac{21-35}{10}=\frac{-14}{10} \approx -1.4$