3 years ago

I need helpppp!!!!!!

Mathematics

1 answer:

Marrrta [24]3 years ago

4 0

Answer:

just add all of them up

Step-by-step explanation:

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One number is four times another number and their difference is 24. find the number.

Flura [38]

8 and 32.

8 times 4 = 32
32 - 8 = 24

4x - x = 24.
^ ^
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3 0

2 years ago

Solve y=-3x² + 4.5x – 20<br> Use the Quadratic formula

statuscvo [17]

Answer:

$x=0.75 \pm 2.47067i$

Step-by-step explanation:

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

√-1 is imaginary number i

Step 1: Define

y = -3x² + 4.5x - 20

a = -3

b = 4.5

c = -20

Step 2: Substitute and Evaluate

$x=\frac{-4.5 \pm \sqrt{4.5^2-4(-3)(-20)} }{2(-3)}$

$x=\frac{-4.5 \pm \sqrt{20.25-240} }{-6}$

$x=\frac{-4.5 \pm \sqrt{-219.75} }{-6}$

$x=\frac{-4.5 \pm \sqrt{219.75}(\sqrt{-1} ) }{-6}$

$x=\frac{-4.5 \pm i\sqrt{219.75} }{-6}$

$x=\frac{4.5 \pm i14.824 }{6}$

$x=0.75 \pm 2.47067i$

7 0

3 years ago

Can someone help me plz

joja [24]

is it from a textbook

7 0

2 years ago

-3+3x=-2(x+1)<br> the 2 is a negative<br> please break it down

Veronika [31]

-3+3x=-2(x+1) First: I will get rid of the bracket:

-3+3x=-2x-2

Now, all the x goes to the left side, all the numbers without x to the right side:

3x+2x=-2+3

we add up"

5x=1

divide by 5:

$x= \frac{1}{5}$

7 0

3 years ago

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Four and sixty eight thousandths in decimal form

kumpel [21]

Answer:4.068

Step-by-step explanation:

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3 years ago

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