All categories

3 years ago

Answer this if you're cool

Mathematics

2 answers:

GalinKa [24]3 years ago

7 0

I’m doing this to in 8th grade I don’t understand it neither

astra-53 [7]3 years ago

3 0

Answer:

Step-by-step explanation:

∠B=65°

∠A+∠B+∠C+∠D=360

90+65+∠C+65=360

∠C=360-220=140°

AB=AD (given)

BC=BD (given)

so ∠B=∠D

also sum of four angles of a quadrilateral=360°

You might be interested in

Plz help if you can<br> Thank ya

koban [17]

Answer:

$90\pi$

Step-by-step explanation:

The first step is to find the slant height of the cone. Using the pythagorean theorem, you can find that $\sqrt{12^2+5^2}=13$ cm. Plugging this into the equation, you get $\pi \cdot 5 \cdot 13=90\pi$ . Hope this helps!

3 0

2 years ago

Which of the following would be an acceptable first step in simplifying the expression sinx/1-sinx

Paha777 [63]

$\bf \textit{difference of squares}
\\\\
(a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)
\\\\\\
\textit{also recall that }sin^2(\theta)+cos^2(\theta)=1\implies cos^2(\theta)=1-sin^2(\theta)\\\\
-------------------------------$

$\bf \cfrac{sin(x)}{1-sin(x)}\implies \cfrac{sin(x)}{1-sin(x)}\cdot \cfrac{1+sin(x)}{1+sin(x)}\implies \stackrel{first~step}{\cfrac{sin(x)[1+sin(x)]}{[1-sin(x)][1+sin(x)]}}
\\\\\\
\cfrac{sin(x)[1+sin(x)]}{1^2-sin^2(x)}\implies \cfrac{sin(x)[1+sin(x)]}{cos^2(x)}
\\\\\\
\cfrac{sin(x)+sin^2(x)}{cos^2(x)}\implies \cfrac{sin(x)}{cos^2(x)}+ \cfrac{sin^2(x)}{cos^2(x)}
\\\\\\
\cfrac{sin(x)}{cos(x)}\cdot \cfrac{1}{cos(x)}+\cfrac{sin^2(x)}{cos^2(x)}\implies tan(x)sec(x)+tan^2(x)
\\\\\\
tan(x)[sec(x)+tan(x)]$

8 0

2 years ago

Read 2 more answers

If the 3 cans cost 0.78 how much will 2 cans cost

ivann1987 [24]

Answer:

.52

Step-by-step explanation:

math ting

6 0

2 years ago

The difference in cost between a large bag of chips and a small bag of chips was 90 cents. Alicia bought 5 large bags and 3 smal

jek_recluse [69]

X-small bag
x+0.9-large bag

5(x+0.9)+3(x)=17.22
5x+4.5+3x=17.22
8x=12.72
x=1.59

the small bag costs 1.59 while the big bag costs 2.49

hopw this helps :)

6 0

3 years ago

HELP ILL MARK BRAINLIST

lisov135 [29]

It’s B. Not enough information given

7 0

2 years ago