You buy two shirts and one sweater for $60 and your sister gets one shirt and two sweaters for $75 how much is a sweater

$30 for a sweater

Step-by-step explanation:

Let's say x is shirts and y is sweaters.

2x+y=60

x+2y=75

We can see that a sweater costs $15 more than a shirt.

You can sort of just guess and check since you cannot solve this using equations.

Let's guess shirts cost $15 and sweaters cost $30

(2×15)+30=

30+30=

60

These prices are correct for our first equation.

15+(30×2)=

15+60=

75

These prices are correct for our second equation.

If the prices both fit, then this must be the correct answer for both of the prices.

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2