Why is 7 a solution for the equation x + 4 = 7

Scores of each of the previous calculus tests were normally distributed with a mean of 74 and standard deviation of 3.8. Steve will be taking the test tomorrow. What is the P (z<-1.05) ?

In scientific notation negative exponents represent very large numbers greater than 10 true or false

Ordering real numbers least to greatest -√270, 16 3/10, - 50/30, - 16.5 ... i mark brainliest!

What would gcf mean in your own words

Niki scored a 78 on her first test and an 85 on her second. Niki forgot what she got on her third test bit she knows that her average is an 85. What did she score on her third test? Write and sole an equation for this problem.

On Saturday, a local hamburger shop sold a combined total of 520 hamburgers and cheeseburgers. The number of cheeseburgers sold was three times the number of hamburgers sold. How many hamburgers were sold on Saturday

Find the area of the circle with a circumstance of 6.28 units

800 employees work for the Metropolitan Transportation Company 1/4 of these are collage graduates, while 5/6 of the remainder are high school graduates. What part of the employees never graduated from high school?

In a local city, the temperature at noon is Negative 3 degrees Celsius. The temperature is expected to decrease by 2.5 degrees Celsius each hour until the temperature reaches Negative 18 degrees Celsius.

Find the sum (3x^2+5x-8) + (5x^2-13x-5)