"find the indicated function values"i just want to know how to do one of them (a, b, or c)

A)   f(-10)

meaning x = -10

the first subfunction applies only below that, namely x < -10.

the second subfunction does contain -10 in it since -10 ⩽ x ⩽ 10, so we use that one then,
 
x = -10, thus x² is (-10)², or 100.

b)    f(10)

x = 10.

that will also be the second subfunction, since it's the one that contains 10, thus,

x = 10, x² is (10)² or 100.

c)  f(11)

x = 11.

well, is not the second subfunction, since its domain goes up to 10, x⩽10.

looking at the third subfunction, that includes 11, since x > 10, thus,

x = 11,

(11)² + 10

121 + 10

131.

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o