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3 years ago

A convex polyhedron has faces that consist of 1 pentagon, 5 congruent equilateral triangles, and 5 congruent

Mathematics

2 answers:

-Dominant- [34]3 years ago

6 0

Answer:

Step-by-step explanation:

Ivanshal [37]3 years ago

5 0

Answer:

Step-by-step explanation:

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Find sin(a+B)

diamong [38]

Answer:

Cos A=5/13

we have

Cos² A= $1-Sin ²A$

25/169=1-Sin²A

sin²A=1-25/169

sin²A=144/169

Sin A= $\sqrt{144/169}=12/13$

again

Tan B=4/3

P/b=4/3

p=4

b=3

h= $\sqrt{3²+4²}=5$

Now

Sin B=p/h=4/5

in IV quadrant sin angle is negative so

Sin B=-4/5

CosB=b/h=3/5

Now

Sin(A+B):sinAcosB+CosAsinB

now 

substitute value

Sin(A+B):12/13*3/5+5/13*(-4/5)=36/65-4/13

=16/65 is a required answer

6 0

3 years ago

Every rational number is a

nordsb [41]

Greetings from Brasil...

a - whole number

FALSE

3/5, for example isnt a whole number

b. natural number

FALSE

0,457888..., for example isnt a natural number

c. integer

FALSE - like a

d. real number

TRUE

The set of real numbers contains the set of rational numbers

ℝ ⊃ ℚ

8 0

4 years ago

May someone help me please?

morpeh [17]

Step-by-step explanation:

y=mx+b since 6 is the y intercept go up six and back -4 times each since it is the x intercept

6 0

3 years ago

1 minus the quotient of r and 7 in algebraic expression

tankabanditka [31]

Answer:

1-(r÷7) or r÷7-1

Step-by-step explanation: Quotient is the result of a division problem.

4 0

3 years ago

NEED HELP ASAP!! WILL GIVE BRAINLIEST!!

tatuchka [14]

what do you need answered the opp length?

4 0

3 years ago

Read 2 more answers