Considering the area of the rectangle, it is found that she will need 17 tiles to cover the floor.
<h3>What is the area of a rectangle?</h3>
The area of a rectangle of length l and width w is given by the multiplication of dimensions, that is:
A = lw
The dimensions in feet are given as follows:
Hence the area in square feet is given by:
A = 4.5 x 3.75 = 16.875 ft².
Each tile has 1 square foot, hence, rounding, she will need 17 tiles to cover the floor.
More can be learned about the area of a rectangle at brainly.com/question/10489198
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Part A
Step-by-step explanation:
4x − 1 ≤ 19 is the same as
4 times 5 minus 1 = 19
So 19 ≤ 19
The symbol ≤ means that the number on the left of the sign is smaller OR EQUAL TO the number on the right
19 is not smaller than 19 but is equal to 19
The symbol < means only that the number on the left is smaller than the number on the right
Part B
Answer:
9
Step-by-step explanation:
5x + 2 = 47
We need the x ( which is the unknown number) to be by its self on one side of the equation ( or the equal sign)
The equation expanded is:
5 * x + 2 = 47 (the symbol * is the times symbol)
Firs we can move the 2 to the other side by taking away the two from the left of the equation and moving it to the right
5x + 2 = 47
-2 -2
To take away the two on the left of the equation we do 2-2 which is 0. And whatever we do on one side of the equation we have to do on the other so 47-2 which is 45
Now the equation looks like:
5x = 45
Now remember that 5x is actually 5 times x
So
5 * x = 45
Now we need to have only x on the left side so we need to move the 5 to the right
To do this we have to make * 5 turn into 0
The opposite of times is divide so we divid the 5 by 5
5/5= 0
Now we do the same on the other side of the equation
5x = 45
5x/5 = 45/5
x = 9
So now x is by its self we can see x = 9
So the answer is
9
The ostrich will win.
It takes the ostrich about 5 minutes to run 5km.
It takes the Emu around 6 minutes to run 5km.
The ostrich will win by about a minute.
An ostrich run 1.16 km/m
An emu runs 0.8 km/m
Let's solve this problem step-by-step.
STEP-BY-STEP SOLUTION:
We will be using simultaneous equations to solve this problem.
Let's establish the two equations we will be using to solve the problem.
Let Andrew's current age = a
Let Andrew's son's current age = s
Equation No. 1 -
a = 3s
Equation No. 2 -
a - 10 = 5s
To begin with, we will substitute the value of ( a ) from the first equation into the second equation to solve for ( s ).
Equation No. 2 -
a - 10 = 5s
( 3s ) - 10 = 5s
3s - 5s = 10
- 2s = 10
s = 10 / - 2
s = - 5
Next we will substitute the value of ( s ) from the second equation into the first equation to solve for ( a ).
Equation No. 1 -
a = 3s
a = 3 ( - 5 )
a = - 15
FINAL ANSWER:
Therefore, the present age of Andrew is - 15 and the present age of Andrew's son's is - 5.
It isn't possible for someone to be negative years old, but this is the answer that I ibtained from the equations.
Hope this helps! :)
Have a lovely day! <3