His sister is 8 because twice his sisters age is 8+8=16 and 16+3=19
Answer:
4.5(1.035)^t
Step-by-step explanation:
An inrease of 3.5% means that each year's total is 103.5% of the year before, right?
Year 1 = 4.5(1.035) = 4.66
Year 2 = 4.66(1.035) = 4.82
etc.
So, year 2 is 4.5(1.035)(1.035) = 4.82
Multiplying something by itself can be written with an exponent instead, so 2 years is...
4.5(1.035)2
Since the number of years is the variable (let's call it t)...
Answer:
11 inches
Step-by-step explanation:
A rectangle's perimeter can be found using:
p=2l+2w
We know that the perimeter, p, is 58, and the length/height is 18. Therefore, we can substitute those values in
58=2(18)+2w
Multiply 2 and 18
58=36+2w
Since we want to find the width, we need to get w by itself. First, subtract 26 from both sides
58-36=36-36+2w
22=2w
Since w is being multiplied by 2, divide both sides by 2. This will cancel out the 2, and leave w by itself.
22/2=2w/2
11=w
So, the width is 11 inches
Answer:
x = 22
3x + 2 = 68°
Step-by-step explanation:
x + 3x + 2 = 90° because this is a right triangle
3x + 2 = 90
4x = 88 divide by 4
x = 22
3x + 2 replace x with the value we found
3×22 + 2 = 68°
ANSWER: +5
EXPLANATION:
(-5) + (-5) + (-5) = (-15)
+20 + (-15) = +5