2 years ago

PLZZZ HELP 3RD TIME ASKING THIS IS WORTH 40% OF MY GRADE

Mathematics

2 answers:

den301095 [7]2 years ago

7 0

Answer:

112

Step-by-step explanation:

Anna35 [415]2 years ago

6 0

Answer:

112

Step-by-step explanation:

You might be interested in

Answer both questions please, help me this hard, help me anyone????????

ivanzaharov [21]

Wait u live in FL
cause i have one of those books too what grade are u in

3 0

2 years ago

Find the value of x² - x+1 when x=√3 -1, in the form a+b√3 where a and b are integers

lidiya [134]

Answer:

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

Step-by-step explanation:

We are given $x=\sqrt{3}-1$ and we are asked to find the value of $x^2-x+1$ .

So we will need to find $x^2$ .

$x=\sqrt{3}-1$

Square both sides:

$x^2=(\sqrt{3}-1)^2$

Expand using identity: $(x-a)^2=x^2-2ax+a^2$ .

$x^2=(\sqrt{3})^2-2(\sqrt{3})(1)+1^2$

$x^2=3-2\sqrt{3}+1$

$x^2=4-2\sqrt{3}$

Let's go back to the full $x^2-x+1$ .

$x^2-x+1$

$(4-2\sqrt{3})-(\sqrt{3}-1)+1$

$4-2\sqrt{3}-\sqrt{3}+1+1$

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

5 0

3 years ago

A horse travels 100 meters at a velocity of 30m/s W. How long does it take the horse to travel this distance?

Dafna1 [17]

The formula for finding time is the distance divided by the velocity.So the answer is 100÷30=3.3333...

6 0

3 years ago

In what ways do you follow a healthy diet?

andrey2020 [161]

By eating healthy and constantly working out

5 0

2 years ago

Read 2 more answers

I NEED HELLLLLLLPPPPPPP? SHOW WORK PLSSSSSS IF WORK IS NOT SHOWN I WILL REPORT YOU! SO WATCH OUT!

Phoenix [80]

Answer is D
(1.5,3)

Explanation:

Substitute

1) 3-2(1.5)=0

So 0=0

2) 3=8(1.5)-9

So 3=3

7 0

2 years ago