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Elan Coil [88]
3 years ago
13

-6.5 plus X = - 4.2 what is x

Mathematics
1 answer:
Neko [114]3 years ago
8 0
X=2.3 
You add 6.5 to both sides and get the answer X equals 2.3 :)
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15.5 rounded to the nearest tenth
Degger [83]
<span>The tenths place is to the right of the decimal point.</span>
In order to round u number to the nearest tenth, you should <span>to the right of the tenths place. Depending on this number you should determine if you will round up or stay the same (if it is bigger than 5 you will round up, if not it will stay the same).
In our case, the number is 15.5 so it is already rounded to the nearest tenth.

</span>
3 0
3 years ago
Which of the following is NOT true about the hypotenuse of a triangle?
fiasKO [112]

Depending on the length of the two sides of the triangle the length could be smaller than 1.

The answer that is not true is :

B. It is always greater than 1

3 0
2 years ago
What is the maximum volume in cubic inches of an open box to be made from a 12-inch by 16-inch piece of cardboard by cutting out
Romashka-Z-Leto [24]

If you start with a 12x16 rectangle and cut square with side length x, when you bend the sides you'll have an inner rectangle with sides 12-2x and 16-2x, and a height of x.

So, the volume will be given by the product of the dimensions, i.e.

(12-2x)(16-2x)x = 4x^3-56x^2+192x

The derivative of this function is

12x^2-112x+192

and it equals zero if and only if

12x^2-112x+192=0 \iff x = \dfrac{14\pm 2\sqrt{13}}{3}

If we evaluate the volume function at these points, we have

f\left(\dfrac{14-2\sqrt{13}}{3}\right) = \dfrac{64}{27}(35+13\sqrt{13})> f\left(\dfrac{14-2\sqrt{13}}{3}\right) = -\dfrac{64}{27}(13\sqrt{13}-35)

So, the maximum volume is given if you cut a square with side length

x=\dfrac{14-2\sqrt{13}}{3}\approx 2.7

5 0
2 years ago
The store bought a pair of shoes for $50, and sold it for $80.What percentage was the mark up
Charra [1.4K]
30% percent is what they marked up
6 0
3 years ago
Help please I don’t understand
FromTheMoon [43]

Answer:

oye me puedes ayudar a mi tarea

es del cuento el príncipe feliz

5 0
2 years ago
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