3 years ago

Please help me solve this. I have been trying to solve this. If the 212 doesn't belong then change it

Mathematics

1 answer:

san4es73 [151]3 years ago

5 0

Answer:

Did you figure this out yet..

Step-by-step explanation:

I kinda need help.

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Will give 25 points and brainliest answer if correct

Norma-Jean [14]

Let $d$ be the common difference between terms in the sequence $\{a_n\}_{n\ge1}$ . Then

$a_{19}=-58$
$a_{20}=a_{19}+d$
$a_{21}=a_{19}+2d$
$\implies-164=-58+2d\implies d=-53$

The first term in the sequence, $a_1$ , satisfies

$a_2=a_1+d$
$a_3=a_1+2d$
$a_4=a_1+3d$
...
$a_{19}=a_1+18d$
$\implies-58=a_1+18(-53)\implies a_1=896$

So the explicit formula for the $n$ -th term in the sequence is

$a_n=a_1+(n-1)d\implies a_n=896-53(n-1)$

5 0

3 years ago

kramer

Value of y= 18 and value of x= 9 root3
therefore answer is D

7 0

3 years ago

Given line BD is congruent to BC, find the measure of angle B

Degger [83]

If BD is congruent to BC, that means that the sides are equal, so their angles are too.
6x-9 = 3x+24
3x = 33
x = 33/3
x = 11
Angle BCD:
6×11-9 = 66-9 =57°
Angle BDC:
3×11+24 = 33+24 = 57°
Angle B:
x = 180° - 2×57°
x = 66°

5 0

3 years ago

In a shelter 15% of the animals are puppies, 45% are cats, and the rest are adult dogs. Based on this information ,if there are

frozen [14]

20 is the answer.

15% of 50= 7.5
45% of 50= 22.5
22.5+7.5=30
50-30=20.

7 0

2 years ago

What's 1207 divide by 7

Vikentia [17]

1207 divided by 7 is equal to 172.4286

8 0

3 years ago

Read 2 more answers