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7 days ago

Write an addition equation that can help you find 9-6. Explain your answer.

2 answers:

5 0

[(3 + 3) + 3] - 3 + 3

This expression is accurate since operations within the brackets are performed first. After solving the parentheses, you add 3; then, you proceed with the outer addition of 3, resulting in 6, which connects to the equation 9 - 6.

Inessa [3.9K]7 days ago

4 0

9 + (-6) seems like it will be effective.

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A follow-up study will be conducted with a sample of 20 people from the 300 people who responded yes (support) and no (do not su

PIT_PIT [3919]

Response:

Detailed explanation:

Hello!

Stratified sampling involves the categorization of the population into subgroups based on pre-established criteria for the study. These subgroups consist of homogeneous units concerning the relevant characteristics. In this instance, individuals in the groups will represent only one of the two potential opinions (support or not support) and not both.

The researcher determines the sample size desired, considering several factors such as finances, material availability, and accessibility to experimental subjects (for instance, if they are endangered species, larger sample sizes may not be feasible).

One might conduct proportionate stratified sampling by selecting a proportion of respondents who answered "yes" along with those who answered "no."

In this sampling method, taking a specific proportion from each subgroup allows for a more straightforward extrapolation of results to the overall populations. For example, if you needed a sample size of n = 20, each stratum would ideally contain half, meaning 10 from the “yes” group and 10 from the “no” group.

I hope this is helpful!

4 0

9 days ago

David is making rice for his guests based on a recipe that requires rice, water, and a special blend of spice, where the rice-to

Leona [4166]

Answer:

8 servings

Step-by-step explanation:

At a ratio of 15:1, for each serving that uses 75 grams of rice, it will need 75/15 = 5 grams of spice. With David having 40 grams of spice, he can prepare ...

40 g/(5 g/serving) = 8 servings

7 0

17 days ago

Read 2 more answers

If the tax rate on homes in Topeka, Kansas is 2.4 percent of their value and Bonnie owns a $100,000 house, how much will the rea

PIT_PIT [3919]

Answer:

$200

Step-by-step explanation:

The yearly tax obligation is...

2.4% × $100,000 = $2,400

Monthly, this amounts to...

$2400/(12 mo) = $200/mo

This means taxes will increase Bonnie's monthly mortgage payment by $200.

3 0

8 days ago

Of the 1,000 students in a local college, 420 own brand X mobile phones and 580 own brand Y mobile phones. Of these students, 80

Inessa [3907]

P(X \ Y) = P(X ∩ Y)/P(Y)
P(X ∩ Y) = 80/1000 = 0.08
P(Y) = 580/1000 = 0.58

P(X \ Y) = 0.08/0.58 = 8/58 = 4/29

8 0

4 days ago

555 grams of wool were needed to knit a sweater, a hat, and a scarf. The hat required 5 times less wool than the sweater and 5 g

Zina [3914]

Answer:

The amount of wool required for a sweater was 400 grams.

A hat needed 80 grams of wool.

A scarf required 75 grams of wool.

Step-by-step explanation:

Let

x ------> grams of wool necessary for a sweater

y -----> grams of wool necessary for a hat

z -----> grams of wool necessary for a scarf

From the information given

x+y+z=555 -----> equation A

y=x/5 ----> x=5y -----> equation B

y=z+5 ---> z=y-5 ----> equation C

By substituting equations B and C into equation A, we can solve for y:

(5y)+y+(y-5)=555

7y=560

y=80 grams

Now, find x

x=5(80)=400 grams

Next, determine z

z=80-5=75 grams

In conclusion,

400 grams of wool was required for the sweater,

the hat needed 80 grams of wool, and

the scarf required 75 grams of wool.

4 0

10 days ago