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3 years ago

I dont really understand this??

Mathematics

2 answers:

jeyben [28]3 years ago

8 0

Answer:

$x\geq -53$

Step-by-step explanation:

The inequality includes -53.

The interval notation is $\:[-53,\:\infty \:)$

$\{ x \in \mathbb{R}: x \geq -53 \}$

Leto [7]3 years ago

5 0

Answer:

x ≥ -53

Step-by-step explanation:

There is a closed circle at -53. That means we include -53 so there is an equals sign

The line goes to the right that means it is greater than

x ≥ -53

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Will give brainliest and add more points to your acc if good awnser Please help ASAP

joja [24]

Hailey's mixing two different coffee blends. Represent them by x and y (in pounds). Then x + y = 5 lb, and x = 5 - y.How much puree Sum. beans are we talking about here?
0.20x +0.80y = 0.60(5 lb) Mult all 3 terms by 100 to get rid of factions:
20x + 80 y = 300. Substitute 5-y for x:
20(5-y) + 80y = 300 => 100-20y + 80y = 300 => 60y = 200, so y = 20/6 or 10/3 lb den x = 5-10/3, or x =5/3 lb
Use 5/3 lb of the first blend and 10/3 lb of the second blend to come up with 5 lb of a 60% blend.

7 0

2 years ago

In the 2014 - 2015 school year, the mean score on the critical reading of the SAT was 490 with a standard deviation of 102 for j

bonufazy [111]

<u>Answer:</u>

The Ranking Percentile is (B) 97.5%

<u>Explanation :</u>

To find the percentile rank we need to find the z- score. After finding the z-score match this value with the corresponding value in z-score table.

Formula to find the z-score

Z-score= $\frac{\text { scored obtained - mean }(\mu)}{\text { standard deviation }(\sigma)}$

Substituting the values in the above equation, we find

Z-score= $\frac{(694-490)}{102}$ =2

So, the Z-score is +2

Now, the corresponding value of Z-score 2 in the table is 0.9772

or the percentile score is 97.72 ~ 97.5 .

3 0

2 years ago

Please find the question

melisa1 [442]

Answer:

By distance formula ,

AB² = (5+1)² + (3-6)²

AB² = 36 + 9

AB = 6.71 units

6 0

3 years ago

Help me with this please I will give you brainlist!

Volgvan

Answer:

it might be D

Step-by-step explanation:

im pretty sure

4 0

2 years ago

What is the value of a in the equation 5a – 10b = 45, when b = 3?

LenKa [72]

5a - 10*3 = 45
5a - 30 = 45
5a = 45 + 30
5a = 75
a = 15

6 0

3 years ago

Read 2 more answers

I dont really understand this??​

I dont really understand this??