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3 years ago

10

List in order the specific operations that you would use to isolate X in the following equation show the step that corresponds t

o each operation
7 + 3 (2 - 3x) = 67

1 answer:

loris [4]3 years ago

8 0

7 + 3.(2 - 3x) = 67
3 brackets are distributed

7+6-9x = 67
13-9x = 67
-9x = 67
x = 67/-9

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The function f(x) = –x2 + 20x – 75 models the profit from one customer, in dollars, a shop makes for printing photos, where x is

trasher [3.6K]

The function is graphed as shown below

Part A:

We use the formula $- \frac{b}{2a}$ to find the vertex of the function. A quadratic function of the form of $a x^{2} +bx+c$ and equating this form to the given function $- x^{2} +20x-75$ , we have
$b=20$ and $a=-1$ .

Substituting $a$ and $b$ into the vertex formula, we have
$x=- \frac{20}{2(-1)}=10$ , as shown in the graph

This calculation means that the highest profit is achieved when the number of photo printed equals to ten photos

Part B:

We can find solution to this equation by factorising

$- x^{2} +20x-75=0$
$-( x^{2} -20x+75)=0$
$x^{2} -20x+75=0$
$(x-5)(x-15)=0$
$x=5$ and $x=15$ , as shown in the graph

The two values means that the company makes no profit when they either produce 5 or 15 photos

8 0

3 years ago

X+ 2 / X + 3 =5 plz give me and<br><br><br><br>

Anna35 [415]

Answer:

The answer is x = -13/4

Step-by-step explanation:

-13/4 + 2 / -13/4 +3 = 5

5 0

2 years ago

Find the Solution of the system of equations.<br><br> -4x+3y=-21<br> -2x-3y=3

LUCKY_DIMON [66]

Answer:

(3, - 3)

Step-by-step explanation: that might be it

8 0

2 years ago

What does Express $4 as a percentage of 50$ mean?

Gwar [14]

That kinda means to see how many times 4 goes into 50 and write that as a percentage. Hoped I helped

4 0

2 years ago

Someone help me with this ASAP

romanna [79]

Answer:

<em>Circumference:</em> 18.84 cm

<em>Area:</em> 28.26 cm^2 (exponent 2)

Step-by-step explanation:

Circumference = 2(pi)r

The diameter is 6. Means the radius is 3 (half of 6)

pi = 3.14

2(3.14) x 3 = 18.84

Circumference is 18.84 cm.

Area of a circle = (pi)r^2

(3.14)(3)^2 = 28.26 cm^2 (exponent 2)

6 0

2 years ago