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3 years ago

I need help really badly with this

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

6 0

Shortcut: you notice that the curve passes through (1,0)

Only log function passes this point.

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Help me with quistion 1 and 2

Anit [1.1K]

The answer to number 1 is B

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3 years ago

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A man sold a watch for rs.252 at 5% profit. find the cost price

xxTIMURxx [149]

Answer:

The cost price of the watch was rs 239.4

Step-by-step explanation:

252 * 0.05 = 12.6

252 - 12.6 = 239.4

Hope this helps.

5 0

3 years ago

Every workday, Zoe bikes 2.6 miles to work along city streets. On the way back, she likes to take a shortcut through a park, so

snow_lady [41]

Answer:

I'm pretty sure it's 7.1 miles in a week

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3 years ago

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Given the equations 9x+3/4y=6 and 2x+1/2y=9, by what factor the equation to eliminate y and solve the system through linea would

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C -3/2

Just multiply the second equation by -3/2
this will make the y term = -3/4y

so adding will eliminate the y terms.

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3 years ago

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Now there is a square city of unknown size with a gate at the center of each side. There is a tree 20 b from the north gate. Tha

Brums [2.3K]

Answer:

The length of each side of the city is 250b

Step-by-step explanation:

Given

$a = 20$ --- tree distance from north gate

$b =14$ --- movement from south gate

$c = 1775$ --- movement in west direction from (b)

See attachment for illustration

Required

Find x

To do this, we have:

$\triangle ADE \sim \triangle ACB$ --- similar triangles

So, we have the following equivalent ratios

$AE:DE = AB:CB$

Where:

$AE = 20\\ DE = x/2 \\ AB = 20 + x + 14 \\ CB = 1775$

Substitute these in the above equation

$20:x/2 = 20 + x + 14: 1775$

$20:x/2 = x + 34: 1775$

Express as fraction

$\frac{20}{x/2} = \frac{x + 34}{1775}$

$\frac{40}{x} = \frac{x + 34}{1775}$

Cross multiply

$x *(x + 34) = 1775 * 40$

Open bracket

$x^2 + 34x = 71000$

Rewrite as:

$x^2 + 34x - 71000 = 0$

Expand

$x^2 + 284x -250x - 71000 = 0$

Factorize

$x(x + 284) -250(x + 284)= 0$

Factor out x + 284

$(x - 250)(x + 284)= 0$

Split

$x - 250 = 0 \ or\ x + 284= 0$

Solve for x

$x = 250 \ or\ x =- 284$

x can't be negative;

So:

$x = 250$

6 0

3 years ago