Which of the following expressions represents the sum of three times a number and eight times a different number?
A. 3x+8y
B. 8x+3x
C. 3x-8y
D. 8x-3y
Let two numbers be x and y. Then
Three time a number=3x
Eight times a different number = 8y
Sum of the two is 3x+8y
Therefore, the Correct Answer is A.
More Questions on TEAS 7 Math
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Q #1: (x/y)-z=rw Solve for x in the equation above.
A. X=y(z+rw)
B. X=rw(y-z)
C. X=rwy+z
D. X=rwy-z
Answer Explanation
Given the equation (x/y)-z=rw, we make x the subject of the formula as follows:
(x/y)-z=rw
Add z to both sides of the equation
(x/y)-z+z=rw+z
(x/y)=rw+z
Multiply both sides by y
(x/y)*y=y(rw+z)
X=y(rw+z)
Rearranging the equation results in:
X = y(z+rw)
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Q #2: Which of the following weights is equivalent to 3.193 kilograms?
A. 3,193,000 grams
B. 3,193 grams
C. 319.3 grams
D. 0.003193 grams
Answer Explanation
We use the relation 1 kg=1000 g to convert 3.193 kg to g
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Q #3: Which of the following is the area of the largest circles that can fit entirely inside a rectangle that measures 8 centimeters by 10 centimeters?
A. 18π cm2
B. 10 π cm2
C. 16 π cm2
D. 8 π cm2
Answer Explanation
To find the area of the largest circle that fits in the rectangle, we need to determine the area of a circle with a diameter of 8 cm or less to fit on the rectangle with the given measurements as illustrated below.
Area of circle= πr2
Radius of circle, r=8cm/2=4cm
Then, area of the largest circle is:
Area of circle= π*4 cm *4 cm =16π cm2
