regular price of the dress?
Answer:
$18
Step-by-step explanation:
since she saved 20% you turn the percentage into a decimal which is .20 then multiply it by 15 because that's how much she saved and you get $3 which you add to $15 and you get the regular price which is $18
The original price for which 4% equals to $3.80 is $95.00 (option c). This was calculated by dividing the given percentage amount ($3.80) by the percentage rate (0.04, which is 4% in the decimal form).
The question is asking us to find out what price $3.80 is 4% of. To answer this, we need to solve for the unknown price, which we'll call 'X'. In the context of this problem, we set up the equation 0.04*X = $3.80. To solve for 'X', we divide $3.80 by 0.04 to find out the original price. Therefore, X equals $95.00, which means that $3.80 is 4% of $95.00. Thus, the answer is c. $95.00.
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Equation 1: a + c = 100
Equation 2: 3a − 2c = 275
B.) 75 children and 25 adults
Equation 1: a + c = 100
Equation 2: 3a + 2c = 275
C.) 25 children and 75 adults
Equation 1: a + c = 100
Equation 2: 3a − 2c = 275
D.) 25 children and 75 adults
Equation 1: a + c = 100
Equation 2: 3a + 2c = 275
Answer:
Option D is correct.
Step-by-step explanation:
A team t-shirt costs $3 per adult and $2 per child.
Let the number of children be = c
Let the number of adults be = a
A team t-shirt costs $3 per adult that is 3a and $2 per child that is 2c, also given is that the total money collected is $275, so equation becomes:
On a certain day, the total number of adults (a) and children (c) who bought shirts was 100, equation becomes:
Now to know the number of children and adult, we can check by plugging in the values from options provided.
25 children and 75 adults = 25(2)+75(3)=50+225 =275
Rest options do not fulfill the requirements, so Option D is correct.
The two lines 2x + ky = 3 and x + y = 1 are parallel when the value of k equals 2, as parallel lines have equal slopes.
To determine the values of k for which these two lines are parallel, we need to first understand that parallel lines have the same slope. The slope is the coefficient, or number, with the variable x in the equation of the line.
The first line 2x + ky = 3 can be rewritten in slope-intercept form (y = mx + b) as:
y = -2/kx + 3/k
Here, the slope is -2/k. The second line x + y = 1 can also be rewritten in slope-intercept form as:
y = -x + 1
Here, the slope is -1.
Since the slopes of parallel lines are equal, we equate -2/k to -1:
-2/k = -1
Solving this equation, we find that k = 2. So, the two given lines are parallel when k = 2.
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Answer:
559.2 yards.
Step-by-step explanation:
Let the height of the mountain be x yards and the distance from the second location to the base of the mountain be y yards.
Then we have the equations:
tan 27 = x/y
tan 23 = x / (220 + y)
From the first equation y = x/ tan27 so substituting in the second one we have:
tan 23 = x / (220 + x / tan 27)
Cross multiply:
x = 220 tan23 + x tan 23 / tan 27
x = 93.384 + 0.833 x
x - 0.833x = 93.384
x = 93.384 / 0.167
x = 559.2 yards to 1 dec place (answer).