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podryga [215]
3 years ago
5

Solve for X and find the length of EF.

Mathematics
2 answers:
lidiya [134]3 years ago
5 0
(x+5)/9 = 6/12
x+5 = 4.5
x = -0.5
EF = ED = 9 - 0.5 + 5 = 13.5
DaniilM [7]3 years ago
3 0

Answer:

X=1? and that would make EF= 15. But what are the choices?

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago
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Pls help! I'm confused. Can you explain this if you can.
alexdok [17]

Answer:

From a <u>table</u>, for an ordered pair (0, y), <em>y</em> will not be <u>zero</u>. From a <u>graph</u>, the y-intercept will not be <u>zero</u>.  From an equation, it will have the form, y = mx + b where b is <u>≠ 0</u>.

Step-by-step explanation:

  • From a <u>table</u>, for an ordered pair (0, y), <em>y</em> will not be <u>zero</u>. If there is not a constant rate of change in the data displayed in a table, then the table represents a nonlinear nonproportional relationship.
  • From a <u>graph</u>, the y-intercept will not be <u>zero</u>. This means that it doesn't contain or go through the origin.  
  • From an equation, it will have the form, y = mx + b where b is <u>≠ 0.</u> (not equal to zero). If an equation is not a linear equation, it represents a nonproportional relationship. A <u>linear equation</u> of the form y = mx + b may represent either a <em>proportional</em> (b = 0) or <em>nonproportional</em> (b ≠ 0) relationship.  Therefore, when b ≠ 0, the relationship between <em>x</em> and <em>y</em> is <u>nonproportional</u>.
7 0
3 years ago
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}&#10;&amount(g)&\textit{\% of titanium}&\textit{grams of titanium}\\&#10;&-----&-----&-------\\&#10;\textit{6\% alloy}&x&0.06&0.06\cdot  x\\&#10;\textit{20\% alloy}&y&0.2&0.2\cdot  y\\&#10;----&-----&-----&-----\\&#10;mixture&100&0.13&100\cdot 0.13\to 13&#10;\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}&#10;x+y=100\to y=\boxed{100-x}&#10;\\\\&#10;0.06x+0.2\boxed{y}=13&#10;\end{cases}

do the substitution, and solve for "x",

what's "y" amount?  well, y = 100 - x
4 0
3 years ago
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