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Stolb23 [73]
3 years ago
10

(t+9)20=140 what is t

Mathematics
2 answers:
GarryVolchara [31]3 years ago
8 0

Answer:

t=-2

Step-by-step explanation:

(t+9)20=140

Distribute the 20

20t +180 = 140

Subtract 180 from each side

20t +180-180 = 140-180

20t = -40

Divide by 20

20t/20 = -40/20

t=-2

nataly862011 [7]3 years ago
3 0

Answer:

-2


Step-by-step explanation:

(t+9)20 = 140

Open the bracket first by multiplying everything by 20.

(20×t) + (20×9) = 140

20t + 180 = 140

20t + 180 - 180 = 140 - 180

20t = -40

20t/20 = -40/20

t = -2

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Lena is 10 years old. She asks her dad how old he is. He tells her that the lowest common multiple of their ages is 14 times the
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Answer:

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Step-by-step explanation:

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The GCF is 5; the LCM is 70 = 5×14.

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Sometimes, I use a little 3-part diagram to think about LCM and GCF. Here, it would look like ...

  (2 [5) 7]

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Here, the product of outside numbers, 2·7 = 14, represents the ratio of the LCM to the GCF. We know that Lena's age has factors of only 2 and 5, so the numbers in the diagram have to be (2[5)7], where 2 and 7 are on the ends and 5 is in the middle.

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3 years ago
at a sale a desk is being sold for 24% of the regular price. the sale price is $182.40 what is the regular price
san4es73 [151]

at a sale a desk is being sold for 24% of the regular price. the sale price is $182.40 what is the regular price​

we have that

24% ------> represent $182.40

so

Applying proportion

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Let

x ----> the regular price

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x=(182.40)*(100)/24

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therefore

<h2>The regular price is $760</h2>
8 0
1 year ago
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