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Romashka [77]
2 years ago
10

Find the geometric mean of 20 and 25​

Mathematics
1 answer:
IrinaK [193]2 years ago
5 0

Answer:   √20⋅25=22.36

Step-by-step explanation:

Geometric mean of 20 and 25 is √20⋅25=22.36(2dp)

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Brass is made up of copper and zinc. 100 grams of brass contains 20 grams of zinc.
Nana76 [90]

Answer:

A.  12 grams Zn

B.  280 g of copper.

Step-by-step explanation:

100 grams of brass

20 grams of zinc

100 grams of brass has 20 grams of Zn.

20/100 = 0.200  Zn   <u>20% Zn  and 80% copper</u>.

A.  (60 g brass)*(0.2) = 12 grams Zn

B.  (350 g brass)*(0.80) = 280 g of copper.

5 0
2 years ago
The equation 2x-7=5+x has exactly one solution. True or false
marishachu [46]

Answer:

True

Step-by-step explanation:

x=5+7=12

The only solution is x=12.

5 0
2 years ago
A swearer cost $20 but the price was reduced to $ 12 what was the price after the price was reduced
bixtya [17]

Answer:

$20-$12=

Step-by-step explanation:  

20-12=8

5 0
3 years ago
Osborne invested $17,000 in stocks and bonds.
Pani-rosa [81]
SYSTEM OF EQUATIONS

S+B = 17000
0.1S+0.07B=1280

Multiply the first equation by 0.1 and subtract the second equation

0.03B=420
B=14,000
S=3,000
6 0
2 years ago
You deposit $300 into a savings account that pays 4% interest compounded annually. How much interest will you earn after 5 years
sammy [17]

Answer:

365

Step-by-step explanation:

300X1.04^5=364.995871

4 0
3 years ago
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