All categories

2 years ago

How do i do 15, 16???

Mathematics

1 answer:

a_sh-v [17]2 years ago

3 0

It's very long so I'm not giving answers but here's how i would do it:

use Pythagoras $a^2 +b^2 = c^2$ where c is the longest side
use sine rule $\frac{a}{sin(A)} = \frac{b}{sin(B)} = \frac{c}{sin(C)}$ where lower cases are the sides, and capitals are their opposite angles.

e.g for 15:

a = 3, b is missing, c = 10

A is missing, B is ?, C is 90

You might be interested in

The sum of 3 consecutive even numbers of 78

Jet001 [13]

26, 24, 28 could be the answer

3 0

3 years ago

Read 2 more answers

Can someone help please i’ll mark branliest!!

andre [41]

Answer:

a= 32 degrees

b= 148 degrees

c= 82 degrees

6 0

2 years ago

The _____ in the hundreds place has a value ____ times as great as the _____ in the _____ place. 440

solong [7]

Answer:

The 4 in the hundreds place has a value 10 times as great as the 4 in the tens place.

Step-by-step explanation:

440 = 400 + 40 + 0

the hundreds place is worth 400 here

it is worth 10x the tens place (40 here)

5 0

2 years ago

2x+3y=1 and y=-2 - 9 solve using linear combination method. Please explain steps.

kaheart [24]

Answer:

$x=17$

Step-by-step explanation:

$2x+3y=1$

$y=-2-9$

In order to combine these two equations, an idea you need to keep in mind is finding a way of setting these equations as equal to each other. I saw that each equation shared a common value, $y$ . In this case, we need to isolate $y$ in the first equation so that both equations $=y$ .

$2x+3y=1$

$3y=-2x+1$

$\frac{3y}{3}=\frac{-2x+1}{3}$

$y=-\frac{2}{3}x+\frac{1}{3}$

With this, we now know that both $-2-9$ and $-\frac{2}{3}x+\frac{1}{3}$ are equal to $y$ , so we can set them equal to each other.

$y=-\frac{2}{3}x+\frac{1}{3}$

$y=-11$

$-\frac{2}{3}x+\frac{1}{3}=-11$

Reply to this if anything I'm saying or doing is confusing in any way, or if you find a mistake. :) Solve for $x$ .

$-\frac{2}{3}x+\frac{1}{3}=-11$

$-\frac{2}{3}x=-11-\frac{1}{3}$

$-\frac{2}{3}x =-\frac{33}{3}-\frac{1}{3}$

$-\frac{2}{3}x =-\frac{34}{3}$

$-\frac{2}{3}x(-\frac{3}{2})=-\frac{34}{3}(-\frac{3}{2})$

$x=\frac{102}{6}=17$

$x=17$

Hopefully this answer is correct AND makes sense in terms of how I achieved it. Again, reply to this with any questions or mistakes I made and I'll do my best to answer or fix them.

4 0

2 years ago

Which of the following is not used to classify biomes?

Slav-nsk [51]

Answer:it’s B on edge bro

Step-by-step explanation:

6 0

2 years ago