Answer:
n=23/10
Step-by-step explanation:
10(n+4)=63
n+4=63/10
n=63/10-4
n=23/10
decimal form: 2.3
I’m supposing you are writing an equation for this. The equation could be written as 6x+10=4y+11.
Answer:
Try this option, note: only calculation is performed, the last two question are missed.
Step-by-step explanation:
<u>to calculate 'x':</u>
the rule: m∠BAC+m∠ABC+m∠BCA=180°; if to substitute m∠BAC=4x+10,m∠ABC=12x-6,and m∠BCA=3x+5, then 4x+10+12x-6+3x+5=180°; ⇔ x=9.
<u>to calculate m∠BAC; m∠ABC; m∠BCA:</u>
m∠BAC=4x+10; ⇒ m∠BAC=36+10=46°;
m∠ABC=12x-6; ⇒ m∠ABC=108-6=102°;
and m∠BCA=3x+5; ⇒ m∠BCA=27+5=32°.
<u>to calculate the angle 1 and 2:</u>
the fule is: m∠1+m∠BAC=180° and m∠2+m∠ABC=180°.
Then m∠1=180-m∠BAC=180-46=134°;
m∠2=180-m∠ABC=180-102=78°.
Proprtions
3 / 6 = 15 / x
so 15 * 6 = 90
divide by 3 and get 30 boys