What’s 1+1 ? A: 2 B: 69 C: 420 D: 3

Mathematics

2 answers:

kherson [118]3 years ago

4 0

Answer:

Step-by-step explanation:

Lisa [10]3 years ago

3 0

Answer:

The answer to 1 + 1 is equal to 2.

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A metallugarist has an alloy with 6% titanium and an alloy with 20% titanium. He needs 100 grams of an alloy with 13% titanium.

dsp73

$\bf \begin{array}{lccclllll}
&amount(g)&\textit{\% of titanium}&\textit{grams of titanium}\\
&-----&-----&-------\\
\textit{6\% alloy}&x&0.06&0.06\cdot x\\
\textit{20\% alloy}&y&0.2&0.2\cdot y\\
----&-----&-----&-----\\
mixture&100&0.13&100\cdot 0.13\to 13
\end{array}$

so.. .whatever those amounts are, of "x" and "y", for the mixture,
they must add up to 100 grams, or x + y = 100

and the titanium percentage of that sum, must yield a 13 grams of titanium on those 100 grams

thus $\bf \begin{cases}
x+y=100\to y=\boxed{100-x}
\\\\
0.06x+0.2\boxed{y}=13
\end{cases}$

do the substitution, and solve for "x",

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

4 0

3 years ago

What is the domain of the quadratic function graphed below?

lora16 [44]

The domain of the graph is the set of all real values

<h3>How to determine the domain?</h3>

The domain is the set of x values of the graph

From the graph, the x values extend in both directions without end

This means that the x values can accommodate all real values

Hence, the domain of the graph is the set of all real values

Read more about domain at:

brainly.com/question/13113489