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katen-ka-za [31]
3 years ago
6

If the mean of the four numbers 4, 8, 2x and 12 is 10, then x is

Mathematics
1 answer:
Cerrena [4.2K]3 years ago
5 0

Answer:

8

4+8+2x+12=10*4

24+2x=40

2x=16

x=8

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What is the area of the rhombus shown below?
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Answer:

C

Step-by-step explanation:

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5 0
3 years ago
In a group of 42 students, 9 study both Art and Biology.
LUCKY_DIMON [66]
Answer:
The probability the student studies Art and
Biology is 0.2143.
Step-by-step explanation:
Denote the events as follows:
A = a students studies Art
B= a students studies Biology
The information provided is:
N = 42
n (An B) = 9
n (A' n B) = 10
n (A' n B') =7
Then the number of students who study Art
but not Biology is:
n(An B') = N -n (An B) -n (A' nB) - n (A'n B')
= 42 - 10 - 7 - 9
= 16
The number of students who study Art but
not Biology is 16.
Compute the probability the student studies
Art and Biology as follows:
P(ANB)
n(ANB)
= 0.2143
Thus, the probability the student studies Art
and Biology is 0.2143.
3 0
2 years ago
A block of wood has a mass of 120g and a volume of 200cm3. What is the density of the wood?
ozzi
Density=mass/volume
given mass=120g and volume=200cm3
density=\frac{120g}{200cm^3}=\frac{3}{5} \space\ \frac{g}{cm^3} or abot 0.6


the density is 0.6 \space\ \frac{g}{cm^3}
3 0
4 years ago
Read 2 more answers
Whats the answer to -20=-4x-6x
Marina86 [1]
2 Would be the answer.


Hope that helps!!
7 0
4 years ago
Help me on my math please
scoray [572]

1) 9m

2) 1/64

3) 50d^3

4) pq^2 (p-q) (p-q)

= pq^2 ( p^2 - 9p -9p +18)

= pq^4 - 18p^2q^2 + 8pq^2

= q^2 - 18p + 8

7 0
4 years ago
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