2 years ago

Please help! :Find the measure of angle y

Mathematics

1 answer:

frozen [14]2 years ago

8 0

Answer:

Step-by-step explanation:

showing that the two lines are proportinal based on their markings, it shows that x=55, and then you just do 180-(55+50), which is 75

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Which value of b would make x²+bx-30 factorable?<br> A. -31<br> B. -17<br> C. 11<br> D. 13

dimulka [17.4K]

Answer:

D. 13

Step-by-step explanation:

well since it's a quadratic equation, it can be written in the form of ax²+bx+c=0. So we have a=1, b=b and c= -30. Also the roots are given by the equation-

x= -b± $\sqrt{b^{2}-4ac}$ /2a. So all I did was put the number from the choices which would satisfy the sqrt part and that turned out to be 13 since $\sqrt{13^{2}-4*1*(-30)$ = $\sqrt{289}$ = 17. So b=13.