A chemical company makes two brands of antifreeze. The first brand is 65% pure antifreeze, and the second brand is 90% pure antifreeze. In order to obtain 130 gallons of a mixture that contains 70% pure antifreeze, how many gallons of each brand of antifreeze must be used

step-by-step explanation:

sry but any answer choices

vhhhbnbb. ddben jenner v

alright so i think for this one it would to draw it out. this may be hard for me to try and draw, but i will do my best on here:

        r

  /       |     \

notice how it forms 2 triangles inside one bigger triangle.

so if we know the angle spr is the same as psr that is saying the measure of angle p is the same as angle s. this means the big triangle psr is either isosceles or equilateral. in both cases, the triangle is perfectly symmetrical when split down the middle, which is in this case rq. because we know it is perfectly symmetrical on both sides, we know that the two triangles inside the bigger one are equal.

feb 25, 2019 - when cylinder,is intersected by a plane as shown, the shape will have two parallel line segments and their ends are joined by congruent semicircles. so, the cross section when joined from end to end , gives rectangle.

step-by-step explanation: