Ihave an algebra question i can't quite figure it out. can anyone ?
a chemist has a 30% and a 45% acid solution. what amount of each solution should be used to make 500ml of solution with 35% acidity?
a) 133 1/3ml of 30% solution and 366 2/3ml of 45% solution
b) 250 ml of each solution.
c) 333 1/3 ml 30% solution and 166 2/3 ml of 45% solution
d) 400 ml of 30% solution and 100 ml of 45% solution

by the way, the 1/3 and 2/3 are fractions.

Anyone know? will mark brainliest if correct!

Manuela claims that and are congruent. which statement best describes her claim? she is incorrect because the segments do not have the same orientation. she is incorrect because the segments do not have the same length. she is correct because the segments have the same length. she is correct because the segments have the same orientation.

After a dreary day of rain, the sun peeks through the clouds and a rainbow forms. you notice the rainbow is the shape of a parabola. the equation for this parabola is y = -x2 + 36. graph of a parabola opening down at the vertex 0 comma 36 crossing the x–axis at negative 6 comma 0 and 6 comma 0. in the distance, an airplane is taking off. as it ascends during take-off, it makes a slanted line that cuts through the rainbow at two points. create a table of at least four values for the function that includes two points of intersection between the airplane and the rainbow. analyze the two functions. answer the following reflection questions in complete sentences. what is the domain and range of the rainbow? explain what the domain and range represent. do all of the values make sense in this situation? why or why not? what are the x- and y-intercepts of the rainbow? explain what each intercept represents. is the linear function you created with your table positive or negative? explain. what are the solutions or solution to the system of equations created? explain what it or they represent. create your own piecewise function with at least two functions. explain, using complete sentences, the steps for graphing the function. graph the function by hand or using a graphing software of your choice (remember to submit the graph).