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3 years ago

What is the measure of ZRST? A. 124° .B. 47 C. 77° D. 62°

Mathematics

1 answer:

Morgarella [4.7K]3 years ago

4 0

Answer:

its 77 degrees

Step-by-step explanation:

i had a test with the same question, i promise its right :)

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Can somebody prove this mathmatical induction?

Flauer [41]

Answer:

See explanation

Step-by-step explanation:

1 step:

n=1, then

$\sum \limits_{j=1}^1 2^j=2^1=2\\ \\2(2^1-1)=2(2-1)=2\cdot 1=2$

So, for j=1 this statement is true

2 step:

Assume that for n=k the following statement is true

$\sum \limits_{j=1}^k2^j=2(2^k-1)$

3 step:

Check for n=k+1 whether the statement

$\sum \limits_{j=1}^{k+1}2^j=2(2^{k+1}-1)$

is true.

Start with the left side:

$\sum \limits _{j=1}^{k+1}2^j=\sum \limits _{j=1}^k2^j+2^{k+1}\ \ (\ast)$

According to the 2nd step,

$\sum \limits_{j=1}^k2^j=2(2^k-1)$

Substitute it into the $\ast$

$\sum \limits _{j=1}^{k+1}2^j=\sum \limits _{j=1}^k2^j+2^{k+1}=2(2^k-1)+2^{k+1}=2^{k+1}-2+2^{k+1}=2\cdot 2^{k+1}-2=2^{k+2}-2=2(2^{k+1}-1)$

So, you have proved the initial statement

4 0

3 years ago

Use cosines to find the measure of angle B<br> A=16, B=22, C=21

romanna [79]

Answer:

more info please\

Step-by-step explanation:

5 0

3 years ago

How do I solve 5x=-4y+4;x=1,2,3

lesya692 [45]

X=1
5=-4y+4
4y=-1
y=-1/4

x=2
10=-4y+4
4y=-6
y=-3/2

x=3
15=-4y+4
4y=-11
y=-11/4

7 0

3 years ago

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Reggie cuts 2 feet from a 9-foot length of rope. Then he cuts 14 inches from the rope. How many inches of rope are left?

babunello [35]

Answer:

He is left with 5 feet and 10 inches.

4 0

2 years ago

PLEAS HALP MEH<<br> What angle measure is complementary to a 37° angle

Fynjy0 [20]

The angle measure would be 53°.

Complementary angles add up to 90° so, if you're trying to find the other angle measure just subtract the angle measurement that you already know from 90.

90 - 37 = 53

Hope this helps! :)<span />

4 0

3 years ago

Read 2 more answers