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Anna71 [15]
3 years ago
6

When you see a problem like -17 - (-7) what do you do first

Mathematics
1 answer:
Karolina [17]3 years ago
6 0
You have to add -17+(-7) when you get (-7) you have to add.
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Please help! asap! thanks! xoxoxo
katovenus [111]

Answer:

B

Step-by-step explanation:

Don't know how to type those here so see attachment

6 0
2 years ago
Read 2 more answers
Let ​g(x)=4x +9 and ​h(x)=x+2. Find the expression.<br> ​(h◦​g)(x)
hammer [34]
So you plug in g(x) for x in h(x)
Since g(x) = 4x + 9, substitution that in
4x + 9 + 2
4x + 11

Solution: 4x + 11
6 0
2 years ago
Read 2 more answers
If you measure a tds of 1.4%, and you used a brew ratio of 15, what is the percent extraction?
sweet-ann [11.9K]
Answer: the extraction is 18.2%.

Explanation:

Let's see few definitions:
TDS = Total Dissolved Solids = solids dissolved in the brew
PE = Percent Extraction = percent of solids extracted from the dry coffee grounds

The percent extraction can be calculated by the formula:
PE = TDS × Rm

where
Rm = ratio between the mass of the brew and the mass of dry grounds

Now, you need to consider the following facts:
1) every 1g of coffee absorbs 2g of water
2) the given brew ratio is 1:15, which means that for every 1g of grounds we use 15g of water

Let's call
x = grams of coffee grounds we want to use
Therefore the mass of the brew will be: 
m(brew) = water we use - water absorbed by the coffee
              = 15·x - 2·x
              = 13·x

Therefore,
Rm = m(brew) / x
       = 13·x / x
       = 13

Hence, the percent of extraction will be:
PE = <span> TDS × Rm
      = 1.4 </span>× 13
      = 18.2
4 0
3 years ago
What is the equation 12xyz – 45? A. monomial. B. constant. C. trinomial. D. binomial.
SVETLANKA909090 [29]
This <em>expression</em>, is a d. binomial

First term: 12xyz
Second term: -45

hope this helps
5 0
2 years ago
Right inequalities to represent the situations below to get the 10% discount a shopper must spend at least $300 USD to represent
vladimir2022 [97]

Answer:

D≥300

Step-by-step explanation:

8 0
2 years ago
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