Step-by-step explanation:
Clickable Demo. Try entering 2x+3<span>=15 @ </span>x<span>=6 into the text box. After you enter the expression, Algebra Calculator will plug </span>x<span>=6 in for the equation </span>2x+3=15: 2(6)+3<span> = 15. The calculator prints True to let you know that the </span>answer<span> is right.</span>
Answer: Point A
Step-by-step explanation: Because the line x goes first and then line y goes .And Point A on the line x is on the negative 3 and on line y it is on positive 3
Answer:
Since the calculated value of z= -1.496 does not fall in the critical region z < -1.645 we conclude that the new program is effective. We fail to reject the null hypothesis .
Step-by-step explanation:
The sample proportion is p2= 7/27= 0.259
and q2= 0.74
The sample size = n= 27
The population proportion = p1= 0.4
q1= 0.6
We formulate the null and alternate hypotheses that the new program is effective
H0: p2> p1 vs Ha: p2 ≤ p1
The test statistic is
z= p2- p1/√ p1q1/n
z= 0.259-0.4/ √0.4*0.6/27
z= -0.141/0.09428
z= -1.496
The significance level ∝ is 0.05
The critical region for one tailed test is z ≤ ± 1.645
Since the calculated value of z= -1.496 does not fall in the critical region z < -1.645 we conclude that the new program is effective. We fail to reject the null hypothesis .
The answer is B. 120+24c=500