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2 years ago

7

Rebecca bought a desk for $70 she refinished it and sold it for a 20% profit? How much profit did she make? What price did she r

esell the desk for

1 answer:

belka [17]2 years ago

6 0

Answer:

she sold it for $84 and made $14

Step-by-step explanation:

take 20% of 70 add it to 70 and bam answer

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What is the solution to sqrt 17-x=x+3? Show your work.

snow_lady [41]

Answer:

$x=1$

Step-by-step explanation:

Remember:

$(\sqrt[n]{a})^n=a\\\\(a+b)=a^2+2ab+b^2$

Given the equation $\sqrt{17-x}=x+3$ , you need to solve for the variable "x" to find its value.

You need to square both sides of the equation:

$(\sqrt{17-x})^2=(x+3)^2$

$17-x=(x+3)^2$

Simplifying, you get:

$17-x=x^2+2(x)(3)+3^2\\\\17-x=x^2+6x+9\\\\x^2+6x+9+x-17=0\\\\x^2+7x-8=0$

Factor the quadratic equation. Find two numbers whose sum be 7 and whose product be -8. These are: -1 and 8:

$(x-1)(x+8)=0$

Then:

$x_1=1\\x_2=-8$

Let's check if the first solution is correct:

$\sqrt{17-(1)}=(1)+3$

$4=4$ (It checks)

Let's check if the second solution is correct:

$\sqrt{17-(-8)}=(-8)+3$

$5\neq-5$ (It does not checks)

Therefore, the solution is:

$x=1$

3 0

3 years ago

ΔABC is similar to ΔDEF. The perimeter of ΔABC is five times the perimeter of ΔDEF. If the area of ΔABC is 100 cm2, what is the

mixas84 [53]

Your answer is letter B) 100% trust me

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3 years ago

12 minus b=-2 solve for b

ycow [4]

12 - b = -2
12 + 2 = b
14 = b

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3 years ago

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What is the X-in intercept of the line 6x + y = 18

Keith_Richards [23]

$\boxed{x=3}$

Step-by-step explanation:

The Standard Form of the equation of line is given by:

$Ax+Bx=C \\ \\ For \ A, \ B, \ C\ Real \ Constant \\ and \ A>0$

So:

$6x+y=18 \\ \\ is \ written \ in \ standard \ form$

The x-intercept can be found setting $y=0$ :

$6x+(0)=18 \\ \\ Isolating \ x: \\ \\ 6x=18 \\ \\ \boxed{x=3}$

<h2>Learn more:</h2>

Parabola: brainly.com/question/10605728

#LearnWithBrainly

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3 years ago

Solve for x. <br><br> -3x + 4 = -8

VARVARA [1.3K]

Solve for X.<span>
-3x + 4 = -8.
</span>X is equal to 4.

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2 years ago

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