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3 years ago

Emergency!!!!!!

Mathematics

1 answer:

Phoenix [80]3 years ago

6 0

Answer:

The answer is c. 28cm2

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It takes Manisha 38 seconds to climb up the stairs of her house. If she spends 504 seconds doing this, how many minutes has she

Mrac [35]

Answer:

Manisha spent 8 minutes and 24 seconds in a week climibing the stairs of her house.

Step-by-step explanation: (totally my work, not copied)

Convert seconds to minutes.

60x8=480

60x9=540

so, 8 minutes

Find the remaining seconds.

504-480=24

Add remaining seconds to minutes

24sec+8min=8min24sec

So hence, your answer is 8 Minutes and 24 Seconds

Manisha spent 8 minutes and 24 seconds in a week climbing the stair of her house.

Thanks!

Mark me brainliest!

~ $FieryAnswererGT$ ~

5 0

3 years ago

Solve (1,21),(2,6);y=a(x+1)^2 +k

slamgirl [31]

Put the coordinates of the points (1, 21) and (2, 6) to the equation of the function:

$y=a(x+1)^2+k\\\\(1,\ 21)\\\\21=a(1+1)^2+k\\21=a(2)^2+k\\21=4a+k\qquad\text{subtract 4a from both sides}\\21-4a=k\qquad(*)\\\\(2,\ 6)\\\\6=a(2+1)^2+k\\6=a(3)^2+k\\6=9a+k\qquad(**)$

Substitute (*) to (**):

$6=9a+(21-4a)\\6=9a+21-4a\\6=5a+21\qquad\text{subtract 21 from both sides}\\-15=5a\qquad\text{divide both sides by 5}\\-3=a\to\boxed{a=-3}$

Put the value of a to (*):

$k=21-4(-3)\\k=21+12\\\boxed{k=33}$

Answer:

$y=-3(x+1)^2+33$

5 0

3 years ago

A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n indepe

Arlecino [84]

Answer:

P(4) =p(x=4) = 0.205078

Step-by-step explanation:

<u>Explanation</u>:-

The probability of x successes in the n independent trials of the experiment.

Given n=10, p=0.5,

By using Binomial distribution

$P(X =x) = n_{C_{x} } p^{x} q^{n-x}$

Given the p = 0.5

q=1-p =1-0.5=0.5

$P(X =4) = 10_{C_{4} } (0.5)^{4} (0.5)^{10-4}$

we will use formula

$n_{C_{r} } = \frac{n!}{(n-r)!r!}$

$10_{C_{4} } = \frac{10!}{(10-4)!4!}=\frac{10X9X8X7X6!}{6!4!} =\frac{10X9X8X7}{4X3X2X1} =210$

$P(X =4) = 210 (0.5)^{4} (0.5)^{10-4}$

$P(X =4) = 210 (0.5)^{4} (0.5)^{6}$

on calculation, we get

P(X=4) = 0.205078

3 0

3 years ago

The perimeter of a rectangle is 200 yards. What are the dimensions of the rectangle if the length is 60 yards more than the wid

puteri [66]

Answer:

L=80

W=20

Step-by-step explanation:

Perimeter = 2×L+2×w

L=w+60

Perimeter - 2×60 = 4×w

200-120 = 80

80/4= w = 20

L=w+60 = 80

8 0

3 years ago

Please answer this correctly

Gwar [14]

Answer:

Step-by-step explanation:

the answer is 4/5

Because there are 5 section and the blueberry takes up 4 of the sections it is 4/5

7 0

4 years ago

Read 2 more answers