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4 years ago

Choose all the numbers that 135 is divisible by. 2 3 4 5 6 9 10

Mathematics

1 answer:

barxatty [35]4 years ago

3 0

Answer:

3,5,9

Step-by-step explanation:

I use the method

if it is even can be divisible by 2

if the first 3 numbers add to something divisible by 3

4 if the first 2 numbers add up to be divisible by 4

5 has to end in 0 or 5

6 has to be divisible by 2 AND 3

9 has to be divisible by 3

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Carl Carpenter buys a drill press. The price, including tax, is $675.00. He finances the drill press over 24 months after making

Alex_Xolod [135]

(0.14×625×25)÷(2×12)
=91.15

91.15+625
=716.15

716.15÷24
=29.8

3 0

3 years ago

Find the product of this question down below

Degger [83]

Answer:

$\large\boxed{D)\ \dfrac{8}{7}}$

Step-by-step explanation:

$8\left(-\dfrac{2}{7}\right)\left(-\dfrac{1}{2}\right)\\\\\text{the product of two negative numbers is positive}\\\\8\cdot\dfrac{2\!\!\!\!\diagup^1}{7}\cdot\dfrac{1}{2\!\!\!\!\diagup_1}=8\cdot\dfrac{1}{7}\cdot\dfrac{1}{1}=\dfrac{8}{7}$

4 0

3 years ago

Either use technology to find the P-value or use

Akimi4 [234]

Answer:

The first step is calculate the degrees of freedom, on this case:

$df=n-1=21-1=20$

Since is a one side left tailed test the p value would be:

$p_v =P(t_{(20)}$

And we can use the following excel code to find it: "=T.DIST(-0.024,20,TRUE)"

Step-by-step explanation:

Data given and notation

$\bar X$ represent the mean

$s$ represent the sample standard deviation

$n=21$ sample size

$\mu_o =140$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

t=-0.024 would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean for the widths of tornadoes is lower than 140 yd, the system of hypothesis would be:

Null hypothesis: $\mu \geq 140$

Alternative hypothesis: $\mu < 140$

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

The statistic is given by: $t = -0.024$