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Gnesinka [82]
3 years ago
15

Rate change word problems. Question attached

Mathematics
1 answer:
babymother [125]3 years ago
7 0
The Answer is 11.5 min it takes 6 people to paint 4 walls
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Q: using the Substitution Method, and the value ory in
GenaCL600 [577]

Answer:

Step-by-step explanation:

To properly apply the substitution method, it will be better for us to rearrange the system of equations to have similar variables on the same side

44 - 4 = -2y ----equation 1

10 = 7x + 4y --- equation 2

We can simply evaluate equation 1 to have

40 = -2y\\y = 40/-2 = -20\\

y = -20

From the first equation alone, we can evaluate the value of y as -20. This is because only one unknown is present in equation one, hence a single equation is sufficient enough to evaluate it. If to unknowns were present, the two equations would have been utilized to evaluate the solution.

5 0
2 years ago
Round to estimate the quotient 715÷11​
SashulF [63]

Answer: 63.63

Step-by-step explanation: Hope this helps. G'day mate!

4 0
2 years ago
M ÷ n - 3 (m + n) with m=-10 and n=-2
avanturin [10]
Given:
m/n-3(m+n)
m=-10 and n=-2

Solving:

-10/-2-3(-10-2) Since m=-10 and n=-2, we substitute them in for the values since they have an equal relationship.

Now, follow Orders of Operations: PEMDAS


-10/-2-3(-12) Simplify parentheses (P)
There are no Exponents (E)
Multiplication (M) and Division (D) are =, so we do whatever operation comes from the left to right.
-10/-2=5 Division comes first on the left.
therefore:
5-3(-12)

-3(12)=-36, Multiplication is last on the right.
therefore:
5-36

5-36=-31 After M/D, we do Addition and Subtraction, which are also =, so we do them left to right.

Therefore -10/-2-3(-10-2)=-31
3 0
3 years ago
How to divide numbers by decimals
tia_tia [17]

Multiply the denominators. Way 2: Move decimal points, divide, and place a decimal point in the quotient. Step 1 Write a decimal point and a zero in the dividend. Step 2 Multiply the divisor by a power of 10 to get a whole number.



7 0
3 years ago
Read 2 more answers
Quotient of a number x and 45?
Dominik [7]
Quotient of a number x and 45?
is equal to x45
8 0
2 years ago
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