Answer: 5.4545 ounces
Step-by-step explanation:
Given the following :
Acid solution required = 75% acid solution
Let the number of ounces of 20% acid solution required = s
Then total ounces acid required can be expressed as :
=0.20s + 0.90 x 20
= 0.20s + 18
While the total ounces required is :
s + 20
Hence, (total ounces of acid / total ounces) = 75% acid solution
= (0.2 + 18) / (s + 20) = 0.75
= 0.2s + 18 = 0.75( s + 20)
0.2s + 18 = 0.75s + 15
18 - 15 = 0.75s - 0.2s
0.55s = 3
S = 3 / 0.55
= 5.4545 ounces
Answer:
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Step-by-step explanation:
5 : 7
Marbles : Stones
35/5 = 7
So stones
= 7 * 7
49
=35 : 49
Answer:
B. Beth's age is 18 years, and Sally's age is 42 years.
Step-by-step explanation:
You can solve this question in a couple of different ways. First, you can use process of elimination. You know that Sally is older than Beth because she has to be 3 times older 6 years ago, so you can get rid of options C and D because they both show Beth as being older. Now you only have A and B, and you can use a different process. Now from just looking at it, you can tell that A actually already shows Sally as 3 times Beth's age, 15 * 3 = 45. If you go to B, you can go ahead and subtract 6 from 18 (Beth's age) which will give you 12, and then multiply that by 3 to get 36. Now if you take 42 (Sally's age) and subtract 6 from it as well, you will get 36. This means that is lines up. To simplify, you are subtracting 6 from both 18 and 42, and then you are multiplying the lower number by 3 to see if it gets to the bigger number.
Hope this helped ^-^
Answer:
Step-by-step explanation:
z = 102 degree (opposite angles of a parallelogram are equal)
z + x + 34 = 180 degree 9sum of adjacent angles of a parallelogram is 180 degree)
102 + x + 34 = 180
x = 180 - 136
x = 44 degree
y + 102 + x = 180 degree (sum of interior angles of a triangle is 180 degree)
y + 102 + 44 = 180
y = 180 - 146
y = 34 degree
