Alyssa took a math test with 20 questions and she answered 16 questions correctly. in order get an a, she needs to answer at least 90% of the questions correctly.
a. did alyssa get an a on this math test? explain.
b. how many questions would alyssa need to answer correctly in order to get an a?
c. on the same exam, alyssa's friend jessie answered three times more questions correct than incorrect. who got higher percentage of the test questions correct, alyssa or jessie? answer c for me

We know that the test has 20 questions in total, and she needs 90% correctly. So, we need to find the 90% of 20:

This means that Alyssa needs to answer at least 18 question correctly to get an A.

Base on this result, we can say that Alyssa got an A.

Alyssa needs to answer 18 question to get an A.

Jessie answer three times more questions correct than incorrect.

C=3(I)

C+I=20

3(I)+I=20

4(I)=20

I=20/4=5

C=3(5)=15

According to this result, Jessie only got 15 questions correct.

Therefore, Alyssa got higher percentage of the questions correct.

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

a

step-by-step explanation: