Answer:$10.50

Step-by-step explanation:

To find how much is off the regular price, we need to convert the percent into a decimal. 25% is the same as .25

42 • .25= 10.50

(or 42 times .25 equals 10.50)

Thus, we save $10.50

**Answer:**

7. 69

**Step-by-step explanation:**

6x+3(x-7) when x=10

6(10)+3(10)-21

60+30-21

90-21

69

**Answer:**

(a) is a real number as the answer is -3

(b) is not a real number as the answer is an imaginary number

**Step-by-step explanation:**

For (b), when you root a negative number, you will get an imaginary number which is not a real number

**Answer:**

A quadrilateral has **360 degrees**.

**Step-by-step explanation:**

**Answer:**

**-1/2, 7 **

**Step-by-step explanation:**

Given the expression

(x -7)(-4x -2)=0

This means that;

x - 7 = 0 and -4x - 2 = 0

x = 0+7 snd -4x = 2

x = 7 and x = -2/4

x = 7 and -1/2

**Hence the solution from least to greatest is -1/2, 7 **