You already know that since you need to pay 10$ for the room you would do 75-10 and you have 65$ left. 12 goes into 65 5 times, because 12x5=60. You then have 5 dollars left. So Carrie can invite 5 people to her birthday party.
Let x=number of hamburgers sold and y=number of hot dogs sold.
Step 1)
cost of burgers X # of burgers + cost of hotdogs X # of hotdogs=$ collected 1.5x + 1.25y=105.5
step 2)
# of burgers sold + number of hot dogs sold = total number of items sold
x + y = 78
step 3) solve for y in the second equation
y = 78 - x
step 4) substitute y = 78 - x in the first equation for the value of y and solve for x
1.5x + 1.25(78 - x)=105.50
1.5 x + 97.5 - 1.25x=105.50
.25x = 8
x = 32
step 5) plug in our value for x in the second equation and solve for y
x+y=78
32+y=78
y=46
answer 32 hamburgers and 46 hot dogs
Add 0.02 by 0.4 and get 0.42 then divide 0.42 by 0.07x and get 6
x=6
Answer:
20 chickens
Step-by-step explanation:
2/8= 5/x
2 times 2.5 is 5, 8 times 2.5 is 20 the ratio is true if we write this:
2/8=5/20
Therefore, with 5 roosters, there are 20 chickens.
Answer:
steps
Step-by-step explanation:
(1 + sinx)(1 - sinx) = 1 - sin²x = cos²x or = cos² -x
cos -x = cos x
∴ (1 + sinx)(1 - sinx) will not equal cos -x, unless x = ±360° or 0°
where cos ±360° or cos 0° = 1