Which of the following expressions is not correctly written in scientific notation? 1 × 10 4
10 × 10 7
9 × 10 2
5 × 10 3
include an explanation please :D

Read the following two statements. then use the law of syllogism to draw a conclusion. if the tv is too loud, then it will give me a headache. if i have a headache, then i will have to rest.

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.