Answer:
The sides of a triangle are 8 cm, 11 cm and 13 cm. What is its area? 9. The sides of a triangle are 15 cm, 17 cm and 8 cm. What is its area? 10. The sides of a triangle are in the ratio of 3 : 4 : 5. If its perimeter is 36 cm, then what is its area? 1. D 2. B 3. A 4. B 5. C 6. A 7. C 8. A 9. C 10. B
Step-by-step explanation:
Well, I can’t see your choices, but hopefully one looks something like this:
1.25x = 11.25
Or
x = 11.25/1.25
Feel free to put more information in the comments, and I will help.
Answer:
275 seconds, or 4 min 35 s
Step-by-step explanation:
The first set is red for 15 seconds and green for 40 seconds, so it repeats the cycle every 55 seconds.
The second set is red for 35 seconds and green for 15 seconds, so it repeats the cycle every 50 seconds.
A car will stop at the first set, wait 15 seconds, then drive for 60 seconds to the second set, which will just turn red. So we need to find how many cycles it takes for the beginning of the two sets to be 75 seconds apart.
If x is the number of cycles of the first set, and y is the number of cycles of the second set, then:
55x + 75 = 50y
y = 1.1x + 1.5
y must be an integer, so we need to find an integer value of x such that 1.1x ends in 0.5. For example, x = 5.
y = 1.1(5) + 1.5
y = 5.5 + 1.5
y = 7
If we wait for the first set to cycle 5 times, the beginning of the 6th cycle will be 75 seconds before the beginning of the second set's 8th cycle. So the pedestrian must wait 5 × 55 = 275 seconds, or 4 min 35 s.
Answer:
.
Step-by-step explanation:
The formula for finding the area of a rectangle is A = l.w, where A is the area, l is the length and w is the width of the rectangle.
This formula is used to find area when l and w are known.
Now, if area A and length l are known the width w will be given by the formula .
Therefore, width = area by length. (Answer)
Answer:
a. x = 24
b. x = 40
Step-by-step explanation:
a.
You are given a right triangle, so use the Pythagorean theorem
a^2 + b^2 = c^2
x^2 + 18^2 = 30^2
x^2 + 324 = 900
x^2 = 576
x = 24
b.
The sum of the measures of all angles is 360 degrees.
x + 2x + 2x + 20 + 3x + 20 = 360
8x + 40 = 360
8x = 320
x = 40