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fiasKO [112]
2 years ago
7

Can I get some help on 56,60,70, and 78 please

Mathematics
1 answer:
Ostrovityanka [42]2 years ago
7 0

What are you doing with these numbers

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What is T In the equation 3/7+t=20/21
stealth61 [152]

Answer:

\large\boxed{t=\dfrac{11}{21}}

Step-by-step explanation:

\dfrac{3}{7}+t=\dfrac{20}{21}\qquad\text{subtract}\ \dfrac{3}{7}\ \text{from both sides}\\\\\dfrac{3}{7}-\dfrac{3}{7}+t=\dfrac{20}{21}-\dfrac{3}{7}\qquad\text{LCD(7, 21)=21}\\\\t=\dfrac{20}{21}-\dfrac{3\cdot3}{7\cdot3}\\\\t=\dfrac{20}{21}-\dfrac{9}{21}\\\\t=\dfrac{20-9}{21}\\\\t=\dfrac{11}{21}

8 0
2 years ago
Erica had 6 coins in her coin collection. She goes to a coin show and buys some more coins. How many coins does she have now?
goldfiish [28.3K]

Answer:

6+x with x equalling the amount of coins bought if that is what you were looking for

Step-by-step explanation:

if you want to make and equation out of this you don't know the amount of coins she bought so you use a variable (x) to replace that unknown number then since it says she bought more she is adding more to her collection which means it would be an addition problem, leaving you with 6+x for your final answer

5 0
3 years ago
Please help. due today.
guapka [62]

Answer:

1, 1/2, 1 1/2

Step-by-step explanation:

Question 1

20 divided by 18 is 1.1

So the answer is closest to 1

Question 2

9 divided by 20 is 0.45

So the answer is closest to 1/2

Question 3

7 divided by 5 is 1.4

So the answer is closest to 1 1/2

Hope this helps!

3 0
2 years ago
A machine in a factory makes 20 gadgets every 1/4 hour. How many gadgets are made every hour?
Hoochie [10]

Answer:

80 machines

Step-by-step explanation:

If a machine makes 20 gadgets every fourth (1/4) of an hour, it makes 80 machines every hour (20*4).

7 0
3 years ago
The ages in years of three brothers are consecutive. The sum of their ages is 39 decreased by the age of the youngest. What are
Sati [7]
Their ages are 18, 19, and 20 bc we is gud at maths boi
4 0
2 years ago
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