exam Maths Puzzle Numerical Ability

i want to know how do you do this problem having troble with math homework please help me!

x+3(2x-5)

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exam Other Question

Please put this into equation form: 400 tickets total sold to game. Student tickets are $2, adults $3. Total $ collected is $1050. I know that the answer is 150 student tix and 250 adult tix, but I need this in equation form.Please help. Hello out there I need some help with two problems,The first one is,Factor.Write prime if the expression cannot be factored:20y^2-33y+10.And the last one is,Factor.Write prime if the expression cannot be factored:x^2+x+6.Thanks for whoever can help me.