I need help with 7-9!!! Does anyone know how to help? PLEASE

see image.

Step-by-step explanation:

For the pairs sec&csc,

tan&cot,

sin&cos

the ratios are equal IF the angles are complementary.

So like, EXAMPLE:

sin 20° = cos 70°

tan 10° = cot 80° or

sec 50° = csc 40°

^^^^these are not the answers! Just see the angles add up to 90°

So you just need to grab the angle info in the parenthesis and ADD it up and set it EQUAL TO 90°

and SOLVE for theta. See image.

marco saved more.   he saved $35 more.

step-by-step explanation:

1+2+3+4+5+6+7+8+9+10 = 55

2*10 = 20

55-20 = 35

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5