All categories

2 years ago

I don’t know how to use parallel lines to prove things...

Mathematics

1 answer:

jonny [76]2 years ago

5 0

Answer:

omg wow

Step-by-step explanation:

You might be interested in

A 4m ladder rest against a vertical wall with its foot 2m from the wall.How far up the wall does the ladder reach?

adell [148]

A) How high up the wall does it reach?

Use the Pythagorean theorem

Height^2 + Base^2 = Hyp^2

H^2+ 2^2 = 4^2 Subtract the 2^2 from both sides

H^2 = 4^2 -2^2 Multiply the square roots of both the numbers

H^2= 16 - 4

H^2 = 12

H= sqrt(12) m

Hope this helps

4 0

3 years ago

Which is the last operation performed when evaluating (8 minus 2 x) squared + 4 for x = 3?

kompoz [17]

Answer:

addition

Step-by-step explanation:

The given expression is $(8-2x)^2+4$

We want to determine the last operation performed when evaluating this expression for x=3.

We substitute to get:

$(8-2*3)^2+4$

Multiply within the parenthesis to get:

$(8-6)^2+4$

Subtract to get:

$2^2+4$

Evaluate the exponent to get:

4+4

Add to obtain:

Hence the final operation is addition

4 0

3 years ago

Read 2 more answers

Can anybody help me with questions 17-23?

sdas [7]

5600 is number 23 helps it helps

7 0

3 years ago

A metallurgist has an alloy with 5% titanium and an alloy with 30% titanium. He needs 100 grams of an alloy with 15% titanium. H

andrey2020 [161]

Let us convert the percentages to decimal format first.. so 5% is just 5/100 or 0.05 and 15% is just 15/100 or 0.15

so hmmm, so, let's say it needs "x" amount and "y" amount of each respectively, so, whatever "x" and "y" are, they must add up to 100, and whatever their concentration is, must add up to what the mixture yields

thus

$\bf \begin{array}{lccclll}
&amount&concentration&
\begin{array}{llll}
concentrated\\
amount
\end{array}\\
&-----&-------&-------\\
\textit{5\% alloy}&x&0.05&0.05x\\
\textit{30\% alloy}&y&0.30&0.3y\\
-----&-----&-------&-------\\
mixture&100&0.15&15
\end{array}
\\\\\\
\begin{cases}
x+y=100\implies \boxed{y}=100-x\\
0.05x+0.3y=15\\
----------\\
0.5x+0.3\left( \boxed{100-x} \right)=15
\end{cases}$

solve for "x"

what's "y"? well, y = 100 - x

4 0

3 years ago

Fourteen school festival tickets were sold to adults and children. A total of $38 was collected from these ticket sales. Adult t

spayn [35]

Answer:

Step-by-step explanation:

8 0

2 years ago