A school band ordered hats for $3 and large T-shirts for $5. They bought 150 items in all for $590. Graph a system of equations to find how many hats and T-shirts the band ordered.
**PLEASE HELP I DONT UNDERSTAND SYSTEM OF EQUATIONS
The number of hats ordered is; 80 and the number of shirts ordered is; 70.
A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.
Given that the Cost of hats = $3
The Cost of shirts = $5
The total cost of all the items = $590.
Total number of items bought = 150 items.
Let us assume that the number of hats ordered be x.
The number of shirts ordered be y
The equation can formed as;
x+y = 150 -------(1)
3x+5y = 590 ---------(2)
Multiply and subtract eq(2) from eq(1),
3x+3y = 450
-(3x+5y = 590)
-2y = - 140
y = 140/2
y = 70.
Thus, the number of shirts ordered is; 70.
Now Substitute y=70 in eq(1),
x+70 = 150
x = 150-70
x = 80.
Thus, the number of hats ordered is; 80.
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B. Find the area of the rectangle when the width is 4 inches.
Answer:
A - x (x+3) = Area of the rectangle
B- 28 inches squared
Step-by-step explanation:
B- using the formula from A
x = 4
x + 3 = 4 +3 = 7
4 times 7 is 28
Answer: 28ins²
Step-by-step explanation:
From the question, let the width of the rectangle = xins.
Therefore, the breadth = ( x + 3 )ins.
(A) The area of the rectangle which is L x B = x( x+ 3 )
= (x² + 3x)ins² . In polynomial.
(B) The area of the rectangle if the width is 4ins, that is if x = 4ins.To find the area, we substitute for x in the area above
= 4² + 3 x 4
= 16 + 12
= 28ins²
So for this trinomial, I will be factoring by grouping. Firstly, what two terms have a product of 16x^2 and a sum of 10x? That would be 8x and 2x. Replace 10x with 2x + 8x:
Next, factor x^2 + 2x and 8x + 16 separately. Make sure that they have the same quantity inside the parentheses:
Now you can rewrite this as , which is your final answer.
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Step-by-step explanation:
Answer:
Rate of change is most commonly defined as "the change in y over the change in x", or "how much does y change when x is changed by 1 unit".
Step-by-step explanation:
(Not drawn accurately)
Answer:
1782
Step-by-step explanation:
I got this by multiplying the sides and dividing the shapes and sizes to the power of pie then added a +c and got 172
Answer:
70.42
Step-by-step explanation: