Which correctly gives the expression using addition?

14.3 – (–21.2)

a.
14.3 + (–21.2)

b.
14.3 + 21.2

c.
–14.3 + (–21.2)

d.
–14.3 + 21.2

Adding and subtracting matricesfind the value of each variable. x = and y = would

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny