HELLP ASAP 1.The language of numbers and symbols that represent numbers. is called?

a Algebra

b Substitute

c Evaluate

d Variable

2. A letter or symbol that represents a number in a algebraic expression. is called

a Variable

b Expression

c Substitution

d Integer

Use this data in the problem below. follow the steps carefully. round to the nearest tenth. lot 3: week 1: 345 week 2: 340 week 3: 400 week 4: 325 step 1. jim enters the data and calculates the average or mean. step 2. jim calculates the deviation from the mean by subtracting the mean from each value. step 3. jim squares each deviation to remove negative signs. step 4. jim sums the squares of each deviation and divides by the count for the variance. step 5. jim takes the square root of the variance to find the standard deviation.

3c2 + 2d)(–5c2 + d) select all of the partial products for the multiplication problem above.

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?