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Mathematics

1 answer:

andrezito [222]3 years ago

3 0

Answer:

Step-by-step explanation:

The question states you need a square. That means whatever you do, must leave a square number like 49 or 64

If you add 6 or 7 to 56 you do not get 64 A and C are both wrong.

If you subtract 7 from 56 you get 49 which is a perfect square and all 4 sides will equal 7.

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tabitha has 2 1/6 pounds of flour. she will use 2/3 pound of flour to make pancakes.how many pounds of flour will be left?

Reptile [31]

There will be 1 1/2 pounds of flour left

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3 years ago

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use the quadratic formula to find the zeros of the function round to the tense of necessary y= 17x^2-21

Kitty [74]

$y=17x^2-21\\\\\text{The zeros of the function:}\ y=0\iff17x^2-21=0\ \ \ |+21\\\\17x^2=21\ \ \ |:17\\\\x^2=\dfrac{21}{17}\to x=\pm\sqrt{\dfrax{21}{17}}\\\\x\approx-1.1\ \vee\ x\approx1.1$

$\text{Use the quadratic formula:}\\\\y=17x^2-21\\\\a=17;\ b=0;\ c=-21\\\\b^2-4ac=0^2-4\cdot17\cdot(-21)=1428\\\\x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a};\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\x_1=\dfrac{-0-\sqrt{1428}}{2\cdot17}=-\dfrac{\sqrt{1428}}{34}\approx-1.1\\\\x_2=\dfrac{-0+\sqrt{1428}}{2\cdot17}=\dfrac{\sqrt{1428}}{34}\approx1.1$

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3 years ago

The product of an irrational number and a rational number is irrational. Sometimes True Always True Never True

shtirl [24]

Answer:

Always true

Step-by-step explanation:

If you can't express the number as a ratio of integers, multiplying or dividing it by integers will not make it so you can.

If π is irrational, 2π is also irrational.

It is <em>always true</em> that the product of a rational and an irrational number is irrational.

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Which set of measures could represent the length of the sides of a right triangle?

Ahat [919]

Answer:

B) 7,11,14

Step-by-step explanation:

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A bathtub holes about to hectoliters of water if 25 L of water are let down the drain how many liters of water are still in the

DanielleElmas [232]

Answer:
75 liters are left in the bathtub

Explanation:
First, we should know that a hectoliter is a unit of capacity that is equal to 100 liters.

We are given that the bathtub holds 1 hectoliter of water.
This means that the bathtub holds 100 liters of water.
We are also given that 25 liters of water were drained from the bathtub.
This means that:
remaining amount of water = original amount - drained amount
remaining amount of water = 100 - 25
remaining amount of water = 75 liters

Hope this helps :)

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3 years ago