7th grade math help me pleasee :(

Find an equation for the linear function which has slope -10 and x-intercept -7

Given abcd ac=38 and ae=3x+4 find the value of x

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin