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Leto [7]
3 years ago
7

Find the CIRCUMFERENCE of a circle with the DIAMETER of 11 ft. HELP PLS

Mathematics
1 answer:
laila [671]3 years ago
5 0

Answer:

half of 11 is: 5.5

5.5 x 3.14 x 2 = 34.54

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Convert 9 days into weeks
Natali [406]

Answer:

1 week= 7 days

number of days= 9

number of weeks= 1 week and 2 days

<em>hope it helps :)</em>

<em>please mark it the brainliest!</em>

7 0
2 years ago
I need help for my class
Nookie1986 [14]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
An ounce of milk contains 20 milligrams of calcium and 60 micrograms of vitamin A.
vova2212 [387]

Answer:

10 ounces of milk and 50 ounces of orange juice

Step-by-step explanation:

Let the amount of milk be x ounces and the amount of orange juice be y ounces.

1. An ounce of milk contains 20 milligrams of calcium and 60 micrograms of vitamin A. Then x ounces of milk contain 20x milligrams of calcium and 60x micrograms of vitamin A.

2. An ounce of orange juice contains 40 milligrams of calcium and 10 micrograms of vitamin A. Then y ounces of orange juice contain 40y milligrams of calcium and 10y micrograms of vitamin A.

<u>Calcium:</u>

20x milligrams in milk

40y milligrams in orange juice

2,200 milligrams in total

Hence,

20x+40y=2,200

<u>Vitamin A:</u>

60x micrograms in milk

10y micrograms in orange juice

1,100 micrograms in total

Hence,

60x+10y=1,100

Solve the system of two equations:

\left\{\begin{array}{l}20x+40y=2,200\\ \\60x+10y=1,100\end{array}\right.

Divide each equation by 10:

\left\{\begin{array}{l}2x+4y=220\\ \\6x+y=110\end{array}\right.

From the second equation:

y=110-6x

Substitute it into the first equation:

2x+4(110-6x)=220\\ \\2x+440-24x=220\\ \\2x-24x=220-440\\ \\-22x=-220\\ \\22x=220\\ \\x=10\\ \\y=110-6\cdot 10=110-60=50

6 0
3 years ago
Points (-21, 5) and (-7,y) have a slope of 5. Find the y coordinate of the point.
hjlf

Answer:

80

Step-by-step explanation:

The equation of finding a slope is y2-y1/x2-x1.

y-5/-7-(-21)=5

y-5/-7+21=5

y-5/15=5

y-5=75

y=80

8 0
3 years ago
(3 pt) Which shows the dimensions of two rectangular prisms that have volumes of 320 mm3 but different surface areas? A. 16 mm b
AVprozaik [17]
D. 8 mm by 10 mm by 4 mm
    20 mm by 8 mm by 2 mm

8 x 10 x 4 = 320 mm
20 x 8 x 2 = 320 mm
8 0
3 years ago
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