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2 years ago

If 3x – 2 = 13, what is the value of x?

Mathematics

2 answers:

inessss [21]2 years ago

8 0

Answer:

x = 5

Step-by-step explanation:

$3x - 2 = 13 \\ 3x = 13 + 2 \\ 3x = 15 \\ x = \frac{15}{3} \\ \huge \red{ \boxed{ x = 5 }}$

irinina [24]2 years ago

8 0

Answer:

x = 5

Step-by-step explanation:

3x - 2 = 13

+2 +2

3x = 15

/3 /3

x = 5

Hope this helps :)

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Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form x2 + bx = c.

barxatty [35]

Answer:

x=9,-1 and $x^2+(-8)x=9$

Explanation:

we have been given with the quadratic equation $x^2-8x-9$

we compare the given quadratic equation with general quadratic equation

general quadratic is $ax^2+bx+c=0$

from given quadratic equation a=1,b= -8,c= -9

substituting these values in the formula for discriminant $D=b^{2}-4ac$

$D=(-8)^2-4(1)(-9)=100$

Now, to find the value of x

Formula is $x=\frac{-b\pm\sqrt{D}}{2a}$

Now, substituting the values we will get

$x=\frac{-(-8)\pm\sqrt{100}} {2}= \frac{8\pm10}{2}=9,-1$

And rewritting the given equation by shifting 9 to right hand side of the given equation and taking minus inside the bracket so as to convert it in the form of

$x^2+bx=c$

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3 years ago

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A gumball machine has 78 gumballs. each person who puts a coin into the machine gets 3 gumballs. after a certain number of peopl

Lesechka [4]

D is the bast answer for this question, but, the equation should be (78-54)/3=p.

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2 years ago

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Your family loves turkey! Uncle Bill ate 1/4 of the turkey, cousin Chris ate 15% of the turkey, cousin Timmy ate 0.3 of the turk

Sladkaya [172]

(1 / 4) = .25
.25 * 100% = 25%
Uncle Bill ate 25%
Cousin Chris ate 15%
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Cousin Timmy ate 30%
Little Dave ate 12%
You ate none.

Cousin Timmy ate the most, 18% of the turkey is left, and 82% of the turkey was eaten.

Defend my work in writing:

I converted my fractions and decimals to percents to find the different percents eaten for each person.

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3 years ago

Which best describes the error in finding the simple interest earned on $500 at 6% for 18 months?

valentinak56 [21]

$540.00 is the interest
Hope I helped
Let me know if you need me to help you with anything else

My Username: Ashlynnicole02

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2 years ago

How to solve negative exponents? (Extended,long)

defon

Easily, you write the inverse of it without a minus
so if you were to find x^(-2) it would be (1/x)^2
The rest is all the same

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3 years ago