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Ray Of Light [21]
3 years ago
14

What is an equivalent expression for n x a using only addition?

Mathematics
1 answer:
marishachu [46]3 years ago
3 0
Nxa= (a+a+a+a+a+.......+a) 
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Suppose a bag of marbles has 4 green, 2 red, 5 yellow, 1 brown, and 7 blue marbles. What is the probability of picking a green m
nata0808 [166]

The bag of marbles has 4 green, 2 red, 5 yellow, 1 brown, and 7 blue marbles.

Total number of marble=4+2+5+1+7=19

The probability P(E) is defined as P(E)=\frac{n(E)}{n(s)}

where n(E) is the total number of favourable events.

and n(s) is the total number of events

Hence for the given data we can write

P(E)=\frac{4}{19}

Because total number of green marbles = n(E)=4

Total number of Marbles =n(S)=19

Hence P(E)=4/19

4 0
3 years ago
Read 2 more answers
A customer service phone line claims that the wait times before a call is answered by a service representative is less than 3.3
Vika [28.1K]

Answer:

(A) Yes, since the test statistic is in the rejection region defined by the critical value, reject the null. The claim is the alternative, so the claim is supported.

Step-by-step explanation:

Null hypothesis: The wait time before a call is answered by a service representative is 3.3 minutes.

Alternate hypothesis: The wait time before a call is answered by a service representative is less than 3.3 minutes.

Test statistic (t) = (sample mean - population mean) ÷ sd/√n

sample mean = 3.24 minutes

population mean = 3.3 minutes

sd = 0.4 minutes

n = 62

degree of freedom = n - 1 = 62 - 1 = 71

significance level = 0.08

t = (3.24 - 3.3) ÷ 0.4/√62 = -0.06 ÷ 005 = -1.2

The test is a one-tailed test. The critical value corresponding to 61 degrees of freedom and 0.08 significance level is 1.654

Conclusion:

Reject the null hypothesis because the test statistic -1.2 is in the rejection region of the critical value 1.654. The claim is contained in the alternative hypothesis, so it is supported.

5 0
3 years ago
Please help! WILL GIVE THE BRAINLIEST!!!
Mariana [72]
Hey there,

Your question states: <span>The coordinates of A, B, and C in the diagram are A(p, 4), B(6, 1), and C(9, q). Which equation correctly relates p and q? 

Your correct answer would be </span><span>D. p − q = 7 BECAUSE . . .we would have to back the number up because we would need to basically subtract </span>P-Q which would give you 7. So D.) would be your answer.

Hope this helps.

~Jurgen
7 0
4 years ago
Read 2 more answers
WILL MARK BRAINLIST
iren [92.7K]

Answer:

See below.

Step-by-step explanation:

1/2 = shrink by a factor of 1/2.

+7 = moved up 7 units.

8 0
3 years ago
Write the vertex form of the equation of the parabola which has a vertex of (0,0) and contains the point (2,-2)
Anettt [7]
\bf \qquad \textit{parabola vertex form}\\\\&#10;\begin{array}{llll}&#10;\boxed{y=a(x-{{ h}})^2+{{ k}}}\\\\&#10;x=a(y-{{ k}})^2+{{ h}}&#10;\end{array} \qquad\qquad  vertex\ ({{ h}},{{ k}})\\\\&#10;-------------------------------\\\\&#10;y=a(x-{{ h}})^2+{{ k}}\qquad &#10;\begin{cases}&#10;h=0\\&#10;k=0&#10;\end{cases}\implies y=a(x-0)^2+0&#10;\\\\\\&#10;y=ax^2\qquad &#10;\begin{cases}&#10;x=2\\&#10;y=-2&#10;\end{cases}\implies -2=a2^2

solve for "a", to get the coefficient, and then plug it back in the equation.
7 0
4 years ago
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