Please help I just don't get it

Mathematics

2 answers:

alexdok [17]3 years ago

7 0

Alright so what you are doing is getting the area of the whole triangle, and that formula is what you do so bxh is 5x12 and 5x12=60 then you need to divide 60 by 2 which is 30 so your answer will be
B 30m^2

Stella [2.4K]3 years ago

3 0

To find the area of a triangle, you can plug in the values of the triangle into the equation. The base of the triangle is 5m, the height is 12m, and the hypotenuse is 13m. We don't need the hypotenuse here, so ignore the 13m. Plugging the base and height:

A = (5*12)/2
= 60 m^2

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DedPeter [7]

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3 years ago

Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. He checks his storage cabinet, but he only has a 5-lite

Delvig [45]

Answer:

0.75 liters of 5% hydrochloric acid solution
0.25 liters of 45% hydrochloric acid solution.

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Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.

As Rajan need total of 1 liter of solution, so

$x+y=1$

i.e $x=1-y$ --------------------1

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$0.05x+0.45y=1\times 0.15$