Answer:
y=3
Step-by-step explanation:
Assuming this is an enlargement where EFGH is enlarged to ABCD then the former is the object and the latter is the image. If so then
scale factor(k) of the enlargement=image length/corresponding object length
k=3/2
Therefore, y=4.5/k
y=4.5/(3/2)
y=3
If we take the assumption another way and say ABCD is reduced to EFGH then the former is the object and the latter is the image.
In that case,
k=⅔
y=4.5×k
y=3
In either case y=3units
The proof that the area of the trapezium is 2x² + x -351 = 0 can be seen in the image attached below.
<h3>What is a trapezium?</h3>
A trapezium is a quadrilateral that has a pair of opposite parallel sides.
From the given diagram:
The area of the trapezium can be computed as;
351 = 2x² + x
2x² +x - 351 = 0 : Proved
Learn more about the area of trapezium here:
brainly.com/question/16904048
Answer:
78.5 cm^2
Step-by-step explanation:
1, find the radius (half a diameter) R = 5
3.14 * 5^2
3.14 * 25 = 78.5
You know how decimals are really long to write, like 0.00000000089? Well, with scientific notation, you can shorten them. Take the decimal I wrote for instance. Using scientific notation, I can change it to 8.9 * 10^-10. The decimal is shortened, and according to the exponent, 10^-10, we move the decimal place for 8.9 to the left ten places, leaving us with 0.00000000089.
