Answer:
416 (3 s.f.)
Step-by-step explanation:
To multiply decimals, begin by multiplying the numbers as if there is <u>no decimal</u>:
Count the number of digits <u>after</u> the decimal point in each factor:
- 128.5 → 1 digit after the decimal point.
- 3.24 → 2 digits after the decimal point.
Therefore, there is a total of 3 digits after the decimal points.
Put the same number of digits after the decimal point in the product.
Therefore, the solution is to the multiplication is:
The factor with the <u>fewest signification figures</u> is 3.24.
This number has 3 significant figures.
Therefore, the solution to 3 significant figures is:
40%out of a 100 that is my answer
5.29/5.2=x/2
times both sides by (5.2)(2)
(2)(5.29)=5.2x
10.58=5.2x
divide both sides by 5.2
2.034=x
answer is $2.03 for 2lb rice
The obtained two numbers by substitution method are 5 and 12.
<h3>What is substitution method?</h3>
The algebraic method for solving simultaneous linear equations is the substitution method.
- The value of one variable through one equation is substituted in the second equation, as the name implies.
- To verify an equation system by substitution, enter your x and y values into the initial equations.
- Your answer is accurate if both simplification expressions are true.
Let the first number be 'x'.
Let the second number be 'y'
From the given condition that second number is 3 times 1 less than the first number.
That is;
y = 3(x - 1)
Now the sum of both number are given as 17.
x + y = 17.
Use substitution method, and put the value of y in the total sum.
x + y = 17.
x + 3(x - 1) = 17
Simplify the given equation;
x + 3x - 3 = 17
4x = 17 + 3
4x = 20
x = 5 (first number)
Put the value of x in y to find the value.
y = 3(x - 1)
y = 3(5 - 1)
y = 12 (second number)
Therefore, the values of two numbers are 5 and 12.
To know more about the substitution method, here
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