Type the correct answer in each box.

Mathematics

1 answer:

vesna_86 [32]2 years ago

5 0

Answer:

X=60°

Y=50°

Step-by-step explanation:

Triangles must equal 180° when you add all angles together.

Triangle with angle X

50+70=120
180-120=60
X=60°

To find the value of Y takes a few more steps, but it isn't hard!

Angle Y is on a line, which equals 180° just like a triangle.

We know X=60°, but we don't know what the blank angle equals.

We use the same steps as we did when finding X

60+50=110
180-110=70
Blank angle=70°

We know that the blank angle=70° and that X=60°

Since the line equals 180, we add the two angles and then subtract from 180, just like before!

70+60=130
180-130=50
Y=50°

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Find the 4th term if the sequend in which a1 = 2 and a n+1 = -4a n + 2

pshichka [43]

$a_n_+_1=-4a_n_+_2$

dividing both sides by -4, we get:

$a_n_+_2=- \frac{a_n_+_1}{4}$

this means, each term is its previous term divided by -4.

now we can construct the sequence as follows:

$a_1=2$

$a_2=- \frac{a_1}{4}= - \frac{2}{4}= -\frac{1}{2}$

$a_3=- \frac{a_2}{4} =- \frac{ \frac{1}{2} }{4}=- \frac{1}{8}$

$a_4=- \frac{a_3}{4}=- \frac{ \frac{1}{8} }{4}=- \frac{1}{32}$

Answer: the last term is -1/32

3 0

2 years ago

Help plz idk okhehehehehe

TiliK225 [7]

That is the answer for the first one