Let me show you how you could have answered this question
without using your computer:
Try out different numbers:
Guess a number.
Square it.
- If the result is less than one of the choices, try a larger number.
- If the result is more than one of the choices, try a smaller number.
- If the result is equal to one of the choices, then that choice is a perfect square.
Try 10.
10 squared =100.
Too small. Try bigger.
Try 20.
20 squared = 400.
Still too small, but getting close. Try bigger.
Try 25.
25 squared = 625
Too big. Try smaller.
Try 23.
23 squared = 529.
Still too big. Try smaller.
Try 21.
21 squared = 441.
Too small, but look where you are now:
21 is too small, and 23 was too big.
Does that give you any ideas ?
What do you think you should try next ?
Try 22.
22 squared = <em>484</em>. <em>
</em>484 is a perfect square.<em> yay !</em>
None of the other choices is a perfect square, because we
already know that 23 squared is bigger than all of them.
Answer:
There are 8 dimes there.
Step-by-step explanation:
This question is solved used a system of equations.
I am going to say that:
x is the number of nickels.
y is the number of dimes.
19 coins
This means that x + y = 19.
A nickel is worth $0.05. A dime is worth $0.1. The total of these coins is $1.35. So
0.05x + 0.1y = 1.35
How many dimes are there?
We have to find y.
From the first equation: x = 19 - y.
Replacing in the second:
0.05(19 - y) + 0.1y = 1.35
0.95 - 0.05y + 0.1y = 1.35
0.05y = 0.4
y = 0.4/0.05
y = 8
There are 8 dimes there.
Answer:
4. 24.39°
5. 27.29°
6. 38.21°
Step-by-step explanation:
Given:
Δ ABC is right angle at A
Δ PQR is right angle at Q
Δ XYZ is right angle at X
To find:
∠ C = ?
∠ P = ?
∠ Z = ?
Solution:
For 4.)
We Know the Identities,
∴
For 5.)
For 6.)
Skew line if there are in the drop down menu
Answer:
x/12
Step-by-step explanation:
1/4 of a pan of brownies leftover.
=1/4 of x
=1/4*x
=x/4
If Carter and two of his friends shares the leftover=3 people
Each friend will get
x/4÷3
=x/4×1/3
=x/12