Please help me I'm very confused

Answers

Answer 1

Answer: The sides of the large cake are 2 times the length of the sides of the small one.

-- The amount of the frosting depends on the area of the cake.
-- The area grows as fast as the square of the sides grows.
-- The ratio of the areas is the square of the ratio of the sides.

-- If you make the sides 2 times as long, the area becomes (2²) = 4 times as much.

-- If you made the sides 7 times as long, you'd need (7²) = 49 times as much frosting.

-- If you made the sides 10 times as long, you'd need 10² = 100 times as much.

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Convert 3/11 to a decimal equivalent using long division

Answers

In order to Convert 3/11 into a decimal, you have to divide 3/11 out. If you were to put the three on top, and the 11 on the bottom, (here's a little tip to make it easier " top dog stays out and snoopy stays in. Top dog would be 3 because it is on the top of the fraction. Snoopy would be the 11 which is on the bottom of the fraction.) so with that being said..... So if you do 3 divided by 11 The answer would be 0.27272727...hope it helped.

1. What is the solution to the system of equations?y = 5x - 7

-3x - 2y = -12

A. (2, 3)
B. (1, -2)
C. (-2, 9)
D. (3, 8)

What is the solution to the systems of equations represented by the 2 equations?
y = 4x + 3

y = -x - 2

A. (1, 7)
B. (-1, -1)
C. (2, -4)
D. (-3, -9)

A family went to an amusement park and paid $12 for each adult and $8 for each child. A group of 15 people went to the park and it cost $140. This system of equations models this situation, where x is the number of adults and y is the number of children.
How many children were in the group?

x + y = 15
12x + 8y = 140

Answers

Answer: 1) A. (2, 3)

2) B. (-1, -1)

3) 10 children

Step-by-step explanation:

1) $\left \{ {{y=5x-7} \atop {-3x-2y=-12}} \right.$

Since the y is already isolated in the first equation, to solve the system you simply substitute that expression into the second equation and then solve, finding the value of x:

$-3x-2(5x-7)=-12\n-3x-10x+14=-12\n-13x=-12-14\n-13x=-26\nx=(26)/(13)=2$

And then you substitute that value into the first equation and solve to find the value of y:

$y=5(2)-7\ny=10-7\ny=3$

So, the solution of the system is (2, 3).

2) $\left \{ {{y=4x+3} \atop {y=-x-2}} \right.$

Since the y is already isolated in both equations, to solve the system you simply equalize the first and the second expression and then solve, finding the value of x:

$4x+3=-x-2\n4x+x=-2-3\n5x=-5\nx=-1$

And then you substitute that value into the first or the second equation (whichever you like) and solve to find the value of y:

$y=-(-1)-2\ny=1-2\ny=-1$

So, the solution of the system is (-1, -1).

3) $\left \{ {{x+y=15} \atop {12x+8y=140}} \right.$

To solve the system, the easiest way is to isolate the y in the first equation and then substitute the expression obtained into the second equation, finding the value of x.

From the first equation: $y=15-x$

Substituting:

$12x+8(15-x)=140\n12x+120-8x=140\n4x=140-120\n4x=20\nx=5$

And then you substitute that value into the first equation and find the value of y:

$y=15-5\ny=10$

So, there were 10 children in the group.

y=5x-7 -3x-2y=-12 (2,3)

y=4x+3 y=-x-2 (-1,-1)

12x+8y=140 5 adults 10 children
12(5)+8(10)=140
60+80=140

During the day, the manager of the meat department sold 15.4 pounds of hamburger to one customer and 13.22 pounds to another customer. When the store opened that morning, he had 35.75 pounds of hamburger to sell. How much hamburger does the manager have left to sell? lb

Answers

The total amount of hamburger that the manager of the store in the morning = 35.75 pounds
Quantity of hamburger sold to one customer during the day = 15.4 pounds
Quantity of hamburger sold to another customer during the day = 13.22 pounds
Total quantity of hamburger sold
by the manager during the day = (15.4 + 13.22) pounds
= 28.62 pounds
Then
The quantity of hamburger left in the store to sell = (35.75 - 28.62) pounds
= 7.13 pounds
So 7.13 pounds of hamburger is still left to be sold.

2z-18-4z=-8 what is the value of z

Answers

$\bold{Hey\ there!} \n \bold{Simply\ both\ sides\ of\ your\ equation\downarrow} \n \bold{2z+(-4z)+(-18)=-8} \n \bold{Now, \ you \ have\ to \underline{Combine\ your\ like\ terms}\downarrow} \n \bold{\bullet \ 2z\ \& \ -4z}\n \n \bold{2z+(-4z)=-2z}\n \bold{-2z-18=-8}\n \bold{Nextly,\ you\ have\ to\ \underline{add}\ by\ 18\ on\ your\ sides\downarrow} \n \bold{-2z-18+18=-8+18} \n \bold{Cancel:-18+18} \n \bold{Keep:-8+18} \n \bold{\underline{Divide}\ by\ -2\ on\ your\ sides\downarrow}\n \bold{(-2z)/(-2)}$ $\bold{= (10)/(-2)} \n \bold{Cancel: (-2z)/(-2)} \n \bold{Keep:(10)/(-2)} \n \n \boxed{\boxed{\bold{Answer: z=-5}}}\checkmark \n \n \n \bold{Good\ luck\ on\ your\ assignment\ \& \ enjoy\ your\ day!}\n \n \frak{LoveYourselfFirst:)}$

Answer- z is equal to -5

A computer salesman gets commission for each sale he makes. If he makes 1.0% commission on a sale of $2,000, how much commission does he make?

Answers

Answer:

1/100 ×$2000=$20

idk if I'm right

Answer:

$20

Step-by-step explanation:

2,000*.01=20

Hope this helps:)

Clock. What is the measure of the angle (in degrees) that the minute hand traces in 20 minutes?

Answers

Based on the number of degrees that 60 minutes is, we can infer that 20 minutes will be 120°.

A total revolution around a clock is 360° and this translates to 60 minutes.

This means that every minute is:

= Number of degrees in total / Number of minutes in revolution

= 360 / 60

= 6° per minute

If there are 20 minutes, the number of degrees is:

= 6 x 20

= 120°

In conclusion, 20 minutes on the clock is 120°.

Find out more at brainly.com/question/19030439.

30 mins make 180deg.
hence 20 min makes,
20/30*180=120 deg