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elena55 [62]
3 years ago
7

1/1×3+1/2×4+1/3×5 +...+1/18×20=Please, help me. ❣️​

Mathematics
1 answer:
Sedaia [141]3 years ago
6 0

Answer:3.1944

Step-by-step explanation:

(1÷1×3)+1÷(2×4)+1÷(3×5)+1÷(18×20)

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katrin [286]
We can write this as two equations. Call Mr. Anders' age A and Kate's age K:
A-5=3(K-5)
A+K=42

Then solve for A in the second equation:
A=42-K

Substitute this into the first equation:
(42-K)-5=3(K-5)
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3 years ago
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Yuri [45]

Answer:

first method

<u>2</u><u>2</u>=<u>5</u>

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second method

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7. x

we multiply the denominators to get 7x

then we multiply each term by 7x

7x×<u>2</u><u>2</u> = <u>5</u>×7x

7. x

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5 0
3 years ago
1. tan (x+x)<br> 2. = tan(x) + tan (x)/1 - tan(x)tan(x)<br> 3. = 2tan(x)/1-tan^2 (x)
RUDIKE [14]

Step-by-step explanation:

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Westkost [7]

Answer:

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Step-by-step explanation:

so, he has $85 in savings, and that he has the opportunity to gain allowance by the following function of 10(x-1).  

total funds(x) = 85 + 10(x-1)  

T(x) = 85 + 10x - 10  

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8 0
3 years ago
a triangle has an area of 110 square inches and a base of 15 in. Which answer best pinpoint the height​
dsp73

Answer:

14.67

Step-by-step explanation:

area = 1/2bh therefor plug in the numbers and you get the anwser.

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