Answer:
h = 3.62
Step-by-step explanation:
First, as both triangles have the same angles we can use the relationship of areas and sides corresponding to similar triangles as follows:

Now we know that the new triangle has sides of 4.18. Then, as these triangles are equilateral we can use the Pythagorean Theorem to find the height:

Finally the height of this new triangle is 3.62 cm
Answer:
C=−Ax−By
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
So,
Serena starts with three fourths pounds of cheese, and uses two thirds of it. That is equivalent to the following expression:

Cross-cancel.

Serena used one-half pound of cheese.
The correct option is C.