Will give 15 !
how many solutions does the equation 5x + 3x –4 = 10 have?
zero
one
two
infinitely many

Step-by-step explanation:

1- 5x + 3x –4 = 10 Put the like terms on separate sides; always put x on the left side (always convert + to- or reversed when you move from side to side e.g -4 becomes 4)

2- 5x+3x= 4+10 calculate the sums

3- 8x=14 divide both by 8

4- x= 1.75

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google