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Alborosie
2 years ago
9

Write 89 tenths in standard form *

Mathematics
2 answers:
Jobisdone [24]2 years ago
4 0

89 tenths......................

Ipatiy [6.2K]2 years ago
3 0

Answer:

.89

Step-by-step explanation:

Standard for is just the number version. Word for is it spelled out, eighty-nine tenths.

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What is two 2/3÷1 1/6
babunello [35]

Answer:

0.57142857142

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
A metalworker has a metal alloy that is 15​% copper and another alloy that is 60​% copper. How many kilograms of each alloy shou
coldgirl [10]

18 kg of 15% copper and 72 kg of 60% copper should be combined by the metalworker to create 90 kg of 51% copper alloy.

<u>Step-by-step explanation:</u>

Let x = kg of 15% copper alloy

Let y = kg of 60% copper alloy

Since we need to create 90 kg of alloy we know:

x + y = 90

51% of 90 kg = 45.9 kg of copper

So we're interested in creating 45.9 kg of copper

We need some amount of 15% copper and some amount of 60% copper to create 45.9 kg of copper:

0.15x + 0.60y = 45.9

but

x + y = 90

x= 90 - y

substituting that value in for x

0.15(90 - y) + 0.60y = 45.9

13.5 - 0.15y + 0.60y = 45.9

0.45y = 32.4

y = 72

Substituting this y value to solve for x gives:

x + y = 90

x= 90-72

x=18

Therefore, in order to create 90kg of 51% alloy, we'd need 18 kg of 15% copper and 72 kg of 60% copper.

6 0
2 years ago
-10 = 2 – 21 <br> Solve for the variable
Arturiano [62]

-10=-19 is the answer goodluck

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Solve for x -3+8×-5=-8
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Answer:

x is 0

Step-by-step explanation:

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Hello,

The formula is f(n)= \dfrac{f(n-1)}{2}&#10;&#10;
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