Answer:
13 nickels and 8 dimes
Step-by-step explanation:
okay, we know that he has $1.45
we know $1= 100 cents.
so we know he has 145 cents
we know one nickel= $0.05
we know one dime=$0.10
we know he has twice as many minuses 3 nickels compared to dimes.
with this information we can make an equation d=dimes n= nickels
145= (5x(n-3)) + (10xd)
we know whatever we plug in for n, d will be half as much. so plug in even numbers that can easily be decided by 2 for n. then take whatever number you put for n and divide it by 2 to get d. for example, if you put 10 for n you would put 5 for d.
eventually you'll end up with an equation that looks like this
145=(5×(16-3))-(10×8)
meaning you have
16-3= 13 nickels
and. 8 dimes
Using a system of equations, the correct statement is given as follows:
B. The equation that represents this situation is 10 + x = -18. The second number is -28.
<h3>What is a system of equations?</h3>
A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
The numbers are x and y, and their sum is -18, hence:
x + y = -18.
The number y is 10, hence:
x + 10 = -18.
x = -18 - 10 = -28.
Which means that option B is correct.
More can be learned about a system of equations at brainly.com/question/24342899
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Answer:
Number of bricks require to make the walls
Step-by-step explanation:
The number of bricks needed to make the wall:
= Volume of the wall/volume of one brick
The wall and the brick are in the shape of a cuboid:
Volume of the Cuboid=
For wall:
Volume of the wall=
For one Brick:
Volume of one brick=
Number of bricks required to make the wall:
3% x
100 $700
Cross multiply and divide your only number which is 100.. 3 is your percent so it has to be over 100 and your x is your variable, your unknown number over $700 Set it up like a Fraction ! 3 times 700= 2,100 divide it by 100 which is equaled to 21 So 21 is like your percent !! Hope this helped...