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Jobisdone [24]
4 years ago
12

20 POINTS!!!!!!! Please help!!!!!!!

Mathematics
2 answers:
Vikki [24]4 years ago
8 0
Your answer is correct in the sense that 14 ≤ x ≤22 since the temperature is 18 ° plus/minus 4°. However, the wording of the problem implies that it wants your final answer in terms of absolute value.

Based on your work, you understand the basics of the problem, and you correctly expressed it as an inequality. The problem is how to express it with an absolute value and only one inequality sign. 

The word "within" implies that ≤ is the correct symbol, rather than < (you were correct to use that symbol)

We can word the expression in this way: The difference between the real temperature and 18° is less than or equal to 4. Difference in this sense is a positive number whether the real temperature is lower or higher than 18, so absolute value is implied.

We can express it mathematically this way:
|18-x| ≤ 4

Plug a few numbers in for X to make sure it makes sense.
If X equals 16 (within the range), |18-16| = 2, which is less than 4
If X equals 20, |-2| equals 2, which is less than 4
If X equals 10, |18-10| = 8, does not comply with our inequality. 
SIZIF [17.4K]4 years ago
4 0

Yes, your answer is correct.

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Vlad [161]

Indeed a good day!

Sir/ or maam

5 0
3 years ago
Does anyone know what's the answer to number 9? It's numeric word problems.
gladu [14]
I believe the answer is 6 and 11. 11 is 5 more than 6 and their product is 66. Hope this helped!
3 0
4 years ago
Read 2 more answers
The point (5,4) lies on a circle. What is the length of the radius of
Flura [38]

Answer:

\large\boxed{r=2\sqrt2}

Step-by-step explanation:

The radius (r) length is equal to the distance between the center of the circle and the point on the circle.

The formula of a distance:

d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Substitute the coordinates of the given points (5, 4) and (3, 2):

r=\sqrt{(3-5)^2+(2-4)^2}\\\\r=\sqrt{(-2)^2+(-2)^2}\\\\r=\sqrt{4+4}\\\\r=\sqrt{(4)(2)}\qquad\text{use}\ \sqrt{ab}=\sqrt{a}\cdot\sqrt{b}\\\\r=\sqrt4\cdot\sqrt2\\\\\boxed{r=2\sqrt2}

8 0
3 years ago
You order plant seeds from a catalog. Each packet cost 0.90 each. The shipping charge is 2.50. If you have 18.50 to spend, how m
kramer
<h2>Answer:</h2>

17

<h2>Step-by-step explanation:</h2>

Cost per Packet * Number of Packets + Shipping =  Amount to Spend

0.90 * b + 2.50 = A

You can spend a maximum of $18.50

A < 18.50

Rearrange the formula to find b

Number of Packets  =  Amount to Spend - Shipping / Cost per Packet

18.50 - 2.50 = 16.00 / 0.9 = 17.7...

You can't have 0.7 of a packet so you have to round down to 17.

Now if you put it into the original formula:

0.90 * 17 + 2.50 = 17.80

And 17.80 is less than 18.50.

4 0
4 years ago
Given m ll n find the value of x.
KATRIN_1 [288]

Answer:

45 degrees

Step-by-step explanation:

Since the angle x and angle 135 degrees are supplementary, you just have to minus 135 from 180 which the answer is 45 degrees.

5 0
3 years ago
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