All categories

3 years ago

Isaac was standing by an apple tree. He noticed that the shadow of the tree measured 270 inches in

Mathematics

1 answer:

inessss [21]3 years ago

6 0

Searching for the answer right now.

You might be interested in

Find x3 − 2y2 − 3x3 + z4 if x = 3, y = 5, and z = −3.

Xelga [282]

Take 3 times 3 minus 2 times 5 times 2 minus 3 cubed plus 4 times negative 3
Use order of operations and answer will be
Negative 50

6 0

3 years ago

The area on a wall covered by a rectangular poster is 270 square inches. The length of the poster is 1.2 times longer than the w

forsale [732]

Answer:

Length = 18 in

Width = 15 in

Step-by-step explanation:

We have that the area of a rectangle is:

A = L * W

but L = 1.2 * W

A = 1.2 * (W ^ 2)

1.2 * (W ^ 2) = 270

(W ^ 2) = 270 / 1.2

W ^ 2 = 225

Therefore, W is equal to:

W = 225 ^ (1/2)

W = +/- 15, but only +15 makes sense

W = 15

Now for L:

L = 1.2 * 15

L = 18

A = 15 * 18 = 270 in ^ 2

4 0

3 years ago

The sum of the ages of Mr Lee and his son is 53 now. 4 years ago, the age of Mr Lee was 4 times that of his son. Find their ages

zepelin [54]

Answer:

Now, Mr Lee's age is 40 years, his son's age is 13 years.

Step-by-step explanation:

4 years ago:

Son's age = x years

Mr. Lee age = 4x years

Now:

Son's age = x + 4 years

Mr. Lee age = 4x + 4 years

The sum of the ages of Mr Lee and his son is 53 now, so

$x+4+4x+4=53\\ \\x+4x=53-4-4\\ \\5x=53-8\\ \\5x=45\\ \\x=9\\ \\4x=36\\ \\x+4=9+4=13\\ \\4x+4=36+4=40$

Now, Mr Lee's age is 40 years, his son's age is 13 years.

3 0

4 years ago

Read 2 more answers

Reuben bought n packs of pencils, each pack had 15 pencils, write an equesion to represent the total number of penciles p that r

zimovet [89]

P=15n. Hope that helps :)

5 0

3 years ago

What is the value of 5n-3 when n=5?

joja [24]

Answer:

Step-by-step explanation:

We are given the expression:—

$\displaystyle \large{5n-3}$

When n = 5, substitute/change n to 5:—

$\displaystyle \large{5(5)-3}$

Evaluate:—

$\displaystyle \large{25-3=\boxed{22}}$

__________________________________________________________

Summary

Substitution

Changing or replacing from a term to another terms/expression is called substitution.

Examples:—

If we are given the expression $\displaystyle \large{2y-1}$ and we want to find the value when y = 4, simply replace y-term to 4.

$\displaystyle \large{2(4)-1=8-1=\boxed{7}}$

__________________________________________________________

If you have any doubts regarding my answer/explanation, do not hesitate to ask in comment!

8 0

2 years ago