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Alex787 [66]
3 years ago
7

PLEASE HELP !!! I’LL GIVE U BRAINLIST / CROWN !!!! please and thank youuu

Mathematics
1 answer:
nata0808 [166]3 years ago
4 0

Answer:

128i^{3} -320i^{4}

Step-by-step explanation:

a^{3}b = (-4i)^{3}(-2+5i) = (-64^{3})(-2+5i) = 128i^{3} - 320i^{4}

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PLEASE HURRY!!!!!!!!!!
valentinak56 [21]

Answer: 1/4

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A volunteer has 12 pounds of birdseed to put in the bird feeders in all of the city parks. There are 13/4 cups of birdseed in a
kozerog [31]

Answer:

\large \boxed{28}

Step-by-step explanation:

1. Calculate the number of cups

\text{Cups} = \text{12 lb}\times\dfrac{1\frac{3}{4} \text{ cups}}{\text{1 lb}} =12\times\dfrac{\text{7 cups}}{4} = 3\times7\text{ cups}= \text{21 cups}

2. Calculate the number of bird feeders

\text{ Feeders}= \text{21 cups} \times \dfrac{\text{1 feeder}}{\frac{3}{4}\text{ cup}}=\text{21 cups} \times \dfrac{\text{4 feeders}}{\text{3 cups}} = 7 \times \text{ 4 feeders}\\\\= \textbf{28 feeders}\\\text{The volunteer can fill $\large \boxed{\textbf{28 feeders}}$}

5 0
3 years ago
A newspaper is conducting a statewide survey concerning the race for governor. The newspaper will take a simple random sample of
katen-ka-za [31]

Answer:

Larger sample size gives less std error and hence test statistic is larger.

Step-by-step explanation:

Given that a newspaper  is conducting a statewide survey concerning the race for governor. The newspaper will take a simple random sample of n registered voters and determine X = the number of voters that will vote for the Democratic candidate. Is there evidence that a clear majority of the population will vote for the Democratic candidate

Group        I   II

Success    640 64

Total   1200 120

p 0.533333333 0.533333333

q 0.466666667 0.466666667

se 0.014401646 0.045542003

p diff 0.033333333 0.033333333

Z 2.314550249 0.731925055

p      0.01           0.233

we find that though p is the same, std error is very small for larger sample size thus making z statistic much bigger.  So we get p value less than 0.05 whereas for 120 sample size, std error is large so Z statistic is small thus making p value to accept null hypothesis

3 0
3 years ago
Twenty times y is at most 100 in interval notation
DiKsa [7]

Answer:

y\in (-\infty ,5]

Step-by-step explanation:

In this problem, we need to write "Twenty times y is at most 100 in interval notation ".

20 times y means, 20y

Atmost means an inequality which is \le

ATQ,

20\times y\le 100

i.e.

20y\le 100\\\\y\le 5

We can also write it as :

y\in (-\infty ,5]

Hence, the required interval notation is y\in (-\infty ,5].

7 0
3 years ago
Divide using synthetic division (3y^4-13y^3+12y^2-33y+9)/(y-4)
tatiyna
3y³-y²+8y-1+5/y-4. is that unless you want the answer smaller
3 0
3 years ago
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