We get the same result if we multiply a number by 4 or if we multiply the number by 7 and then add 9

1 answer:

7 0

No we don’t say you multiply 4 and 6 you get 24 then add 9 you get 33 and then say you multiply 7 and 3 which is 21 then you add 9 you get 30 so you wouldn’t get the same results

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I was stuck on the same thing in my class test. I ended up failing but if I get the answers to it I’ll totally send them to you!!!

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3 years ago

after 20 minutes he is on page 151, after 45 minutes he was on page 181. how many pages had clint read prior to study hall

xeze [42]

127 is the answer bc if you subtract 45-20 that gives you 25 minutes and then in 25 minutes he read 30 pages so you can divide 30÷25 which gives you 1.2 so then you’re going to multiply 20 and 1.2 which gives u 25 and subtract 24 from 151

6 0

2 years ago

Is (5, 4) a solution to this system of equations?<br> 2x + 3y = 23 <br> y + x = 9

lions [1.4K]

No because it works for y + x= 9 but not the first one

6 0

3 years ago

A circular rug has the radius of 4 feet. Which of the following is closest to the number of square inches the rug covers.

Angelina_Jolie [31]

Answer:

B. 50.24ft

Step-by-step explanation:

A=(pie)r^2

A=3.14(4)^2

A=3.14 * 16

A=50.27

Closest to 50.24

6 0

3 years ago

What dimensions of the box maximize the volume of the box?<br><br> please help thank you so much!

bonufazy [111]

so, let's recall that the volume of a rectangular prism, namely a box, is Lwh, just the product of its dimensions, length, width and height.

now, check the 1st picture below. we know the original paperboard is a 16x14, so the width, as you see in the picture is w = 8 - x, its length is L = x, and its height is 14 -(x/2) - (x/2).

$\bf V(x)=\stackrel{L}{(x)}\stackrel{w}{(8-x)}\stackrel{h}{\left( 14-\cfrac{x}{2}-\cfrac{x}{2} \right)}\implies V(x)=(8x-x^2)(14-x) \\\\\\ V(x)=112x-8x^2-14x^2+x^3\implies V(x)=x^3-22x^2+112x$

now, let's find the critical points, by setting the derivative to 0, and then we'll do a first-derivative test.

$\bf \cfrac{dV}{dx}=3x^2-44x+112\implies 0=3x^2-44x+112 \\\\\\ \textit{plugging those values in the quadratic formula}\qquad x\approx \begin{cases} 11.39\\ 3.28 \end{cases}$

now, if we plot those two points, we get 3 regions, and then we check each of those regions to see what's the value of the first derivative.

check the 2nd picture below, that'd be the first derivative test, as you can see from the arrows, the slope increases and then decreases at 3.28, namely that critical point is the maximum, so the Volume maximizes at x = 3.28.

6 0

2 years ago