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3 years ago

HELP!

Mathematics

1 answer:

kicyunya [14]3 years ago

5 0

Answer:

60m^2

Step-by-step explanation:

Ok so if you subtract the 18 by 12 then divide by two you get the missing lengths of each of te triangles. If you then use the area of a trapezoid formula (think about it like pulling one triangle off one side and putting it next to the other to make a rectangle) you just do L x W and get 60.

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10) 28n4 + 16n? – 80n² = 0 Factoring quadratic

Setler79 [48]

Answer:

2n(14n^2+3)=28n^4+16n I'm not sure if you meant to put the question mark between or not but I did it separately for -80^2=0 n would equal zero hope this helped

Step-by-step explanation:

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3 years ago

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If sin α=(12/13), and cos α=(5/13), then tan α = ?

Olin [163]

Sin α = 12/13 opposite/hypothenue
cos α = 5/13 adjacent/hypothenue
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3 years ago

Solve each proportion. 2/8=5/r+8

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Answer:

r=-20/31

Step-by-step explanation:

1)divide the numbers

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3 years ago

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allochka39001 [22]

Answer\

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Step-by-step explanation:

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3 years ago

Given $dc = 7$, $cb = 8$, $ab = \frac{1}{4}ad$, and $ed = \frac{4}{5}ad$, find $fc$. Express your answer as a decimal.

Pachacha [2.7K]

A ↔ B ↔ C ↔ D ↔ E ↔ F

$\frac{1}{4} AD$ 8 7 $\frac{4}{5} AD$ ???

AB + BC + CD = AD segment addition postulate

$\frac{1}{4} AD$ + 8 + 7 = AD

$\frac{1}{4} AD$ + 15 = AD

AD + 60 = 4AD

60 = 3AD

20 = AD

AB = $\frac{1}{4} AD$ = $\frac{1}{4}(20)$ = 5

DE = $\frac{4}{5}AD$ = $\frac{4}{5}(5)$ = 4

CD + DE + EF = CF segment addition postulate

7 + 4 + EF = CF

11 + EF = CF

Answer: 11 + EF

Note: You did not provide any info about EF. If you have additional information that you did not type in, calculate EF and add it to 11 to find the length of CF.

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3 years ago

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