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2 years ago

Pls answer this for meeee

Mathematics

1 answer:

Roman55 [17]2 years ago

7 0

Answer:

7 hamsters at 5 pesos each and 13 hamsters at 8 pesos each

Step-by-step explanation:

5x + 8y = 139

x + y = 20

x = 20 - y

5x + 8y = 139

5(20 - y) + 8y = 139

100 - 5y + 8y = 139

100 + 3y = 139

3y = 139 - 100

3y = 39

3y/3 = 39/3

y = 13

x + y = 20

x + 13 = 20

x = 20 - 13

x = 7

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Solve 4e^2x-3=12 please help

Anestetic [448]

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Step 1:

Here we have -3 in subtraction on the left side, so when we take it to the right we apply opposite operation of subtraction that is addition.

$4*e^{2x} = 12+3$

$4*e^{2x} = 15$

Step 2:

Next we have 4 in multiplication on left side, so dividing right side by 4,

$e^{2x} = 15/4$

$e^{2x} = 3.75$

Step 3:

taking log on both sides

$ln ( e^{2x}) = ln(3.75)$

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Step 4:

Dividing right side by 2,

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3 years ago

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2 years ago

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balandron [24]

Answer:

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2 years ago

Verify the identity. 4 csc 2x = 2 csc2x tan x

vlada-n [284]

Step-by-step explanation:

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We start with Left hand side

We know that csc(x) = 1/ sin(x)

So csc(2x) is replaced by 1/sin(2x)

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Also we use identity

sin(2x) = 2 sin(x) cos(x)

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4 divide by 2 is 2

Now we multiply top and bottom by sin(x) because we need tan(x) in our answer

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2 years ago

If a = 5 and b = 6, evaluate the following expression: a 3a + b

babymother [125]

Answer:

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Step-by-step explanation:

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Pls answer this for meeee​

Pls answer this for meeee