Answer:
C
Step-by-step explanation:
given
x + 19 ≤ - 5 ( isolate x by subtracting 19 from both sides )
x ≤ - 24 → C
With the help of the ratio method, we conclude that 72 grams of sugar should be added.
<h3>
What is Ratio Method?</h3>
- In the ratio method, we compare two quantities by equating their two ratios; this equation is also referred to as a proportion.
- The cross-multiplication method will be used to solve it.
So, 'n=5' will be the number of rings.
- 'w = 18 grams' will be the weight of each ring.
- Total weight: w₀ = n × w = 5 × 18 = 90 grams
Let 's' be silver. Then,
- New weight: wₙ = s + 90
- Old % of gold: p₀ = 90% = 0.9
- New % of gold: pₙ = 50% = 0.5
Now, use the ratio method as follows:
- 90 × 0.9 = 0.5 × (s + 90)
- 81 = 0.5s + 0.5 × 90
- 81 = 0.5s + 45
- 81 - 45 = 0.5s
- 36 = 0.5s
- 36/0.5 = s
- 72 = s
- So, s = 72
Therefore, with the help of the ratio method, we conclude that 72 grams of sugar should be added.
Know more about Ratio Method here:
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The correct question is given below:
A jeweler has five rings, each weighing 18 grams, made of alloys of 10% silver and 90% gold. He decides to melt down the rings and add enough silver to reduce the gold content to 50%. How much silver should he add?
Answer:
<u><em>the comuter does 1 calculation in 1.5* nanosec</em></u>
Step-by-step explanation:
<u><em>First step: we need to write all terms in nanosec, as we know:</em></u>
<u><em>1[nanosec]= [sec]</em></u>
<u><em>The computer does 6.7* []</em></u>
<u><em>if we multiplicate for , from the units convertion.</em></u>
<u><em>6.7* [ * </em></u>
<u><em>6.7* []</em></u>
<u><em>Now doing a simple three rule we have this:</em></u>
<u><em>6.7 * calculation in ⇒ 1 nanosec</em></u>
<u><em>1 calculation in ⇒ </em></u>
<u><em>So, we found: the comuter does 1 calculation in 1.5* nanosec</em></u>
Answer:
60%
Step-by-step explanation:
Percentage
= 15/25 × 100%
=3/5 × 100%
= 60%
Answer:
False
Step-by-step explanation:
A reflection image is always congruent to the original figure. Hope this helps!