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Daniel [21]
3 years ago
7

I’m so confused on this. Someone please help, please and thank you <3

Mathematics
1 answer:
galben [10]3 years ago
7 0

Step-by-step explanation:

The formula of a distance between two points:

d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

We have

A(0, 0), C(a, b)

AC=\sqrt{(a-0)^2+(b-0)^2=\sqrt{a^2+b^2}

B(a, 0), D(0, b)

BD=\sqrt{(0-a)^2+(b-0)^2}=\sqrt{(-a)^2+b^2}=\sqrt{a^2+b^2}

Therefore AC = BD.

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In a 20% off sale a coat was £220. work out the original price
BARSIC [14]
10% of 220= £22
10% *2 = £44
£220- £44 =£176
5 0
3 years ago
Find the percent change from the first value to the second.<br><br> 50; 39
sertanlavr [38]

Answer:

11 percent

Step-by-step explanation:

if you subtract 50 - 39 = 11

so 11 percent is the change from the first value to the second value.

Hope this helps :)

7 0
2 years ago
Whats the roots of the following three problems:
klemol [59]

QUESTION 1

The given function is

f(x)=\frac{(x-3)(x-1)}{(x-1)(x+2)}

We simplify to get;

f(x)=\frac{x-3}{x+2}

This function is equal to zero when x-3=0

\Rightarrow x=3

QUESTION 2

The given function is

f(x)=\frac{5x^2-10x+5}{2x^2-5x+3}

f(x)=\frac{5(x^2-2x+1)}{2x^2-5x+3}

We factor to get;

f(x)=\frac{5(x-1)^2}{(2x-3)(x-1)}

f(x)=\frac{5(x-1)}{(2x-3)}

This function equals zero when

5(x-1)=0

x=1

QUESTION 3

The given function is

f(x)=\frac{x^3-8}{x^2-6x+8}

We factor to get,

f(x)=\frac{(x-2)(x^2+2x+4)}{(x-2)(x+4)}

f(x)=\frac{x^2+2x+4}{x+4}

The function equals zero when x^2+2x+4=0

D=b^2-4ac

D=2^2-4(1)(4)

D=-12

Hence the equation has no real roots.

The complex roots are

x=-\sqrt{3}i-1 or x=-1+\sqrt{3}i

4 0
3 years ago
ADE
valina [46]

Answer:

7 cups of sugar

Step-by-step explanation:

Find out how many pies Luca need to bake left =

45 - 17 = 28

1 cup of sugar = 4 pies

28 ÷ 4 = 7 cups of sugar

This may be wrong as this was rushed as I have to go for my next class now.

4 0
3 years ago
An ice cream truck was parked near a beach, and some kids ran to it and formed a line. Then, more kids joined the line by fillin
Irina-Kira [14]

Answer:

7

Step-by-step explanation:

So, we know that this process happened 3 times in total. The original amount of kids we can call x, so the next wave filled in the gaps inbetween, so we call that amount x-1, the next wave would be (x+x-1)-1 or 2x-2, and the last would be 4x-4

adding this all up we get 8x-7=49, so 8x = 56 or x = 7

3 0
2 years ago
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