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LuckyWell [14K]
3 years ago
8

Please help you guys

Mathematics
1 answer:
Svetach [21]3 years ago
5 0

Answer:

It should be 21.1

Step-by-step explanation:

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A steel pipe 50 cm long has an outside diameter of 2 cm and an inside diameter of 1.8 cm. If the density of the steel is 7.8 gra
never [62]

Answer:

the volume is 50x1.8x2

v=180cm³

therefore, density is mass/volume

Step-by-step explanation:

mass =density x volume

mass= 7.8 x 180cm³

mass= 1,404grams

4 0
3 years ago
There are a total of 122 countries in Africa, Europe, and North America (as of 2003). Europe has twice as many countries as Nort
Eddi Din [679]
A + E + N = 122
E = 2N
A = 7 + E....A = 7 + 2N

(7 + 2N) + 2N + N = 122
5N + 7 = 122
5N = 122 - 7
5N = 115
N = 115/5
N = 23 <== North America

E = 2N
E = 2(23)
E = 46 <== Europe

A = 7 + E
A = 7 + 46
A = 53 <=== Africa
8 0
3 years ago
16/5 divided by 5 equals?
Sveta_85 [38]
16 divided by 5 equals 3.2
4 0
3 years ago
An ounce of almonds costs $1.40. If Joey buys 2.4 ounces of almonds, how much will he have to pay?
Daniel [21]

Answer:

Joey will pay $3.36 for 2.4 ounces of almonds.

Step-by-step explanation:

Given that:

Cost of almonds = $1.40 per ounces

Number of ounces bought by Joey = 2.4 ounces

Cost of 2.4 ounces = Ounces of almond * Cost per ounce of almond

Cost of 2.4 ounces = 2.4 * 1.40

Cost of 2.4 ounces = $3.36

Hence,

Joey will pay $3.36 for 2.4 ounces of almonds.

4 0
3 years ago
How to factorise this question
miskamm [114]

Answer:

Step-by-step explanation:

90-2(a-3)^2

=88{(a)^2-2*a*3+(3)^2]

=88[a^2-6a+9}

=88a^2-528a+792

7 0
2 years ago
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