The average of ben’s three tests is 89. each test is worth 100 points. what score does he have to make on his 4th test to get an average of 90?

93

Step-by-step explanation:

Let's see what kind of equation we can make with this information.

90=((3×89)+x)/4

90×4=267+x

360-267=x=93

We can make this equation work because every test is worth 100 points.

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq