Answer:
6 / 2 or 3
Step-by-step explanation:
y2 - y1
_____ = (9 - 3) / (6 - 4) = 6 / 2 = 3
x2 - x1
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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To write this as an algebraic expression, remember that twice a number means that 2 is being multiplied by a number. Since we are not solving, we can just use the variable n to represent the number that is being multiplied by 2. Finally, adding 5 to the number we will get the expression 2n + 5.
4 consecutive odd integers whose sum is 232 are : 55, 57, 59, 61
Let the first integer be x and x is an odd number.
Let Four consecutive odd integers are;
x, x + 2, x + 4, x + 6
(x) + (x + 2) + (x + 4) + (x + 6) = 232
4x + 12 = 232
4x = 232 - 12
4x = 220
x = 220/4
x = 55
x + 2 = 55 + 2 = 57
x + 4 = 55 + 4 = 59
x + 6 = 55 + 6 = 61
The numbers are : 55, 57, 59, 61
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Answer:
21 birds.
Step-by-step explanation:
Let B represent the number of birds and C represent the number of cats.
We have been given that an animal shelter spends $1.50 per day to care for each bird, so the amount spent on B birds will be 1.50B.
The animal shelter spends $8.50 per day to care for each cat, so the amount spent on C cats will be 8.50C.
Alexander noticed that the shelter spent $108.00 caring for birds and cats on Tuesday. We can represent this information in an equation as:
Alexander found a record showing that there were a total of 30 birds and cats on Tuesday. We can represent this information in an equation as:
We will use substitution method to solve system of linear equations.
From equation (2) we will get,
Substituting this value in equation (1) we will get,
Let us subtract 255 from both sides of our equation.
Let us divide both sides of our equation by -7.
Therefore, there were 21 birds at the shelter on Tuesday.