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2 years ago

OMG PLEASE HELP HELP ME I NEED SO MUCH. HELP ME ON BOTH OF THEM PLEASE !!!

Mathematics

1 answer:

irina [24]2 years ago

3 0

Pencils: 6 18 66
Erasers: 2 6 22

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What is the quotient of 15÷3?

Ludmilka [50]

Answer:

Step-by-step explanation:

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2 years ago

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14 times 0.999 blank 14

DedPeter [7]

14 times 0.999 blank 14
probably it is a relation symbol
=
>
<
<u>>
<</u>

so we know that x times 1=x
therefor
x times (less than 1)<x
0.999 is less than 1
0.999<1
therefor
14 times 0.999<14

blank is <

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3 years ago

Which expression is equivalent to 9x − 2x + 3 and why?

PIT_PIT [208]

9x - 2x = 7x. 7x +3 is the answer. Hope it helps ;)

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2 years ago

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The path of a volley ball thrown over a net is modeled with the function A(x) = -0.02x2 + 0.6x + 5, where x is

LiRa [457]

Answer:

The ball travel horizontally 37 feet before it hits the ground

Step-by-step explanation:

we have

$A(x)=-0.02x^2+0.6x+5$

where

x ----> is the horizontal distance in feet

A ---> is the altitude of the ball, in feet.

we know that

When the ball hit the ground, the altitude of the ball is equal to zero

For A(x)=0

$-0.02x^2+0.6x+5=0$

solve the quadratic equation

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-0.02x^2+0.6x+5=0$

$a=-0.02\\b=0.6\\c=5$

substitute in the formula

$x=\frac{-0.6\pm\sqrt{0.6^{2}-4(-0.02)(5)}} {2(-0.02)}$

$x=\frac{-0.6\pm\sqrt{0.76}} {-0.04}$

$x=\frac{-0.6\pm0.87} {-0.04}$

$x=\frac{-0.6+0.87} {-0.04}=-6.75$

$x=\frac{-0.6-0.87} {-0.04}=36.75$

therefore

The ball travel horizontally 37 feet before it hits the ground

3 0

2 years ago

How should the number 1.230 x 103 be properly expressed as a decimal?

hoa [83]

Answer: 1,230
Usage of 10^x form is called scientific form and it helps much in science where the calculation unit can vary from very big into very small.
In this case, you are given the number 1.230 x 10^3 and asked to express it in decimal form. Then you just simply need to multiply the number with the 10^3. The calculation would be: 1.230 x 10^3= 1.230 x 1000= 1230

4 0

3 years ago