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3 years ago

Howto multiply 30 times 30 HELP

2 answers:

8 0

Here is a way I was thought with zeroes, first do 3x3 which is 9 then since there are 2 zeroes you tack on 2 zeroes at the end to get 900. Hope this helped.

xenn [34]3 years ago

6 0

30=3 times 10 right so
30 times 30=3 times 10 times 3 times 10=3 times 3 times 10 times 10
we know that 3 timmes 3=9
and 10 times 10 is 100
so 30 times 30=9 times 100=900

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The national mean sales price for a new one-family home is $181,900. A sample of 40 one-family homes in the south showed a sampl

SIZIF [17.4K]

Answer:

The null hypothesis is $\mu = \$181,900$

The alternative hypothesis is $\mu < \$ 181.900$

$t = -2.92$

$p-value = 0.0016948$

There no sufficient evidence to support the conclusion that the population mean sales prices for new one-family homes in the South is less expensive than the national mean of $181,900

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = \$ 181, 900$

The sample size is $n = 40$

The sample mean is $\= x = \$ 166,400$

The sample standard deviation is $s= \$ 33, 500$

The null hypothesis is $\mu = \$181,900$

The alternative hypothesis is $\mu < \$ 181.900$

Generally the test statistics is mathematically represented as

$t = \frac{ \= x - \mu }{ \frac{s}{\sqrt{n} } }$

=> $t = \frac{ 166400 - 181900 }{ \frac{33500}{\sqrt{40} } }$

=> $t = -2.92$

Generally the p-value is obtain from the z-table the value is

$p-value = P(Z < t ) = P(Z < -2.93) = 0.0016948$

=> $p-value = 0.0016948$

From the calculation we see that

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

Thus there no sufficient evidence to support the conclusion that the population mean sales prices for new one-family homes in the South is less expensive than the national mean of $181,900

3 0

3 years ago

What is the value of these coins?

Alborosie

Answer:

$2.39

Step-by-step explanation:

4 pennies=4

2 nickels=10

10 dimes=100

5 quarters=125

$2.39

3 0

3 years ago

Read 2 more answers

Please help me with this i need help she is gonna call my mom again!!!

telo118 [61]

Answer:

1. 15

2. -23

3. -16

Step-by-step explanation:

1. Find h(-8)

h(t) = $\frac{5}{4}(4 - t)$

h(-8) = $\frac{5}{4}(4 -(-8))$

h(-8) = $\frac{5}{4}(4+8) =\frac{5}{4}(12)=5(3)=15$

2. What is the value of g(-3)

g(x) = 4(x - 5) + $x^{2}$

g(-3) = 4(-3 - 5) $-3^{2}$

g(-3) = 4(-8) + 9

g(-3) = -32 + 9

g(-3) = -23

3. Find f(10)

f(x) = 14 - 3x

f(10) = 14 - 3(10)

f(10) = 14 - 30

f(10) = -16

7 0

3 years ago

Read 2 more answers

I need help for this quizzz hurry plz

dlinn [17]

Answer:

Step-by-step explanation:

b: left arrow with filled in dot

c: right arrow with filled in dot

d: left arrow with NO filled in dot

5 0

3 years ago

What term should be added to y2-14y to make it a perfect square<br> trinomial?

Ksju [112]

Answer:

Step-by-step explanation:

Given the monomial y²-14y, in order to make the binomial a perfect square, we need to add a constant to the function using completing the square method.

To get the constant, we will multiply the coefficient of y by 1/2 and then square the resulting value.

- The coefficient of y is -14.

multiplying the coefficient of y by 1/2 will give -14/2 = -7

- squaring -7 will result in (-7)²

= 49

The constant that will be added to the binomial to make it a perfect square trinomial is 49

4 0

3 years ago