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3 years ago

Is x+3 ≥ 12 correct?

1 answer:

5 0

Yes this is correct because the line under the > means equal to or more than and sense we don’t know the value of x it would be more than 12 hope this helps please mark brainlist <3

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the sum of 3 decimal numbers is 6. Exactly one of the numbers is less than 1 what could those numbers be.

kati45 [8]

There are infinitely many solutions to this problem (which is why it asks what could those numbers be), so you just have to make one up!

Start with the first sentence.
x + y + z = 6.0

Now one of those numbers has to be less than 1. I'll choose x. And I'll choose a random number, say, 0.7.

0.7 + y + z = 6.0

Now I'll subtract 0.7 from both sides to see what y and z have to add up to.

0.7 + y + z - 0.7 = 6.0 - 0.7
y + z = 5.3

Now I'll choose a random number for y that's less than 5.3.

2.6 + z = 5.3

And subtract 2.6 from both sides to find z.

2.6 + z - 2.6 = 5.3 - 2.6
z = 2.7

And now we have our numbers!
x = 0.7
y = 2.6
z = 2.7

3 0

3 years ago

Find the volume of each sphere 40mm

Anastasy [175]

The formula for finding the volume of a sphere is $V=\frac{4}{3} \pi r^3$

If 40mm is the radius of the sphere, the volume will be about $2.68\times10^5$ mm.

5 0

3 years ago

A simple linear regression analysis was conducted to predict the Exam 3 score of students in STA 2023 based on their Exam 1 scor

Tju [1.3M]

Answer:

Option 3) The expected Exam 3 score for someone that made a 0 on Exam 1 is a 50.57.

Step-by-step explanation:

We are given the following in the question:

$\hat{y}(x) = 50.57+0.4845x$

The above equation is a linear regression equation to predict the Exam 3 score of students in STA 2023 based on their Exam 1 score.

$\hat{y}$ : The dependent variable, Exam 3 score

x: The independent variable, Exam 1 score

Comparing to general linear equation,

$y = mx + c$

We get,

m = 0.4845, c = 50.57

where

c is the y - intercept and the score in exam 3 when exam score is 0.

$\hat{y}(0) = 50.57+0.4845(0)\\\hat{y}(0) = 50.57$

m is the slope and tells us about the rate of change.

When exam 1 grade is increased by 1, we can write,

$\hat{y}(x) = 50.57+0.4845x\\\hat{y}(x+1) = 50.57+0.4845(x+1)\\\hat{y}(x+1)-\hat{y}(x) = 50.57+0.4845(x+1)-( 50.57+0.4845x)\\\hat{y}(x+1)-\hat{y}(x) = 0.4845(x+1-x)\\\hat{y}(x+1)-\hat{y}(x) = 0.4845$

Thus, the y-intercept for the given equation can be interpreted as

Option 3) The expected Exam 3 score for someone that made a 0 on Exam 1 is a 50.57.

6 0

3 years ago

Read 2 more answers

Help math questions plz

Damm [24]

-4 no

6 yes

-9 no

4 no

7 0

3 years ago

Dan and Chris share in the profits of a toy store. If the total profit is $80,000 and c is the amount Chris receives, write an

Naily [24]

Answer:

d = 80,000 - c

Step-by-step explanation:

Amount Dan receives = d

The total profit of what Dan receives plus what Chris receives is 80,000, so we can write:

d + c = 80,000

To solve that as an expression of what Dan receives, we can subtract both sides by c

d = 80,000 - c

4 0

4 years ago

Is x+3 ≥ 12 correct?​

Is x+3 ≥ 12 correct?