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3 years ago

Please help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

ollegr [7]3 years ago

7 0

Your answer would be either A...or D.

kolezko [41]3 years ago

5 0

I believe it is "D" I know it's not "C" or "B"

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The sum of a number y and 9 is at least -1 ?

ioda

Answer:

(y + 9) ≥ -1

Step-by-step explanation:

Step 1: Convert words into an expression

The sum of a number y and 9 is at least -1

(y + 9) ≥ -1

Answer: (y + 9) ≥ -1

If needed solve

y + 9 - 9 ≥ -1 - 9

y ≥ -10

8 0

3 years ago

Mindy makes an annual salary of $24,590. What is the maximum monthly rent she could afford to pay? $553.27 $688.52 $234.99 $573.

andrezito [222]

Lets say u have 1 coconut that cost 688.52 ad another 1 that cost 234.99
all you have to do is sale or buy an extra coconut to get 573.77 if that help dont forgot to drop me the brainlist

3 0

3 years ago

Read 2 more answers

NarStor, a computer disk drive manufacturer, claims that the median time until failure for their hard drives is more than 14,400

Ne4ueva [31]

Answer:

The test statistics is $t = -1.727$

Step-by-step explanation:

From the question we are told that

The data given is

330 620 1870 2410 4620 6396 7822 81028309 12882 14419 16092 18384 20916 23812 25814

The population mean is $\mu = 14400$

The sample size is n = 16

The null hypothesis is $\mu \le 14400$

The alternative hypothesis is $H_a : \mu > 14400$

The sample mean is mathematically evaluated as

$\= x = \frac{\sum x_i}{n}$

$\= x = \frac{330+ 620+ 1870 +2410+ 4620+ 6396+ 7822+ 8102+8309+ 12882+ 14419+ 16092+ 18384 +20916+ 23812+ 25814 }{16}$

=> $\= x = 10799.9$

The standard deviation is mathematically represented as

$\sigma =\sqrt{\frac{ \sum (x_i - \=x)^2}{n}}$

$\sigma =\sqrt{\frac{(330- 10799.9)^2 + (620- 10799.9)^2+ (1870- 10799.9)^2 +(2410- 10799.9)^2 + (4620- 10799.9)^2 +(6396- 10799.9)^2 +(7822- 10799.9)^2 }{16}} \ ..$

$..\sqrt{ \frac{(8102 - 10799.9)^2 +(8309 - 10799.9)^2 + (12882 - 10799.9)^2 + (14419 - 10799.9)^2 + (16092 - 10799.9)^2 + (18384 - 10799.9)^2 +(20916 - 10799.9)^2 }{16}} \ ...$

$\ ... \sqrt{\frac{(23812 - 10799.9)^2 +(25814 - 10799.9)^2 }{16}}$

=> $\sigma = 8340$

Generally the test statistic is mathematically represented as

$t = \frac{10799.9- 14400}{ \frac{8340}{\sqrt{16} } }$

$t = -1.727$

From the z-table the p-value is

$p-value = P(Z > t) = P(Z > -1.727) = 0.95792$

From the values obtained we see that

$p-value > \alpha$ so we fail to reject the null hypothesis

Which implies that the claim of the NarStor is wrong

5 0

3 years ago

What is n+34= in commuting porperty of addition

dimaraw [331]

Hi! hope your having a great day. Lets begin with this math problem huh?

n+34 is clearly 6th grade math and im in 8th so let me give you a hand and tell you the answer is 34n

4 0

3 years ago

The table shows the relationship between the number of drops of food color added to different number of cups of cake frosting:

stepladder [879]

I'd say that they are all equivalent because when you divided all of them it equals each other.

2:6 = 1/3

3:9 = 1/3

4:12 = 1/3

6 0

2 years ago

Read 2 more answers