Talil is going to make some concrete mix. he needs to mix cement, sand and gravel in the ratio 1: 3: 5 by weight. talil wants to make 180kg of concrete mix. talil has 15 kg of cement 85kg of sand and 100kg of gravel. does talil have enough cement, sand and gravel to make the concrete mix?

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

I’m still confused on how to work the percentages

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?