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3 years ago

Last year 12 records in his collection now he has 15 records what is his percent increase of his Collection

Mathematics

1 answer:

Nesterboy [21]3 years ago

3 0

Given that,

Last year record = 12

This year record = 15.

To find,

The percent increase of his Collection.

Solution,

The percent increase in his collection is given by :

$\%=\dfrac{\text{final collection-initial collection}}{\text{initial collection}}\times 100\\\\=\dfrac{15-12}{12}\times 100\\\\=25\%$

So, the percent increase of his collection is 25%.

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zahra has paper rectangles of different sizes. every rectangle is 5 cm longer than it is wide. Is there a proportional relations

Vinil7 [7]

As given Zahra has paper rectangles of different sizes.

Also, Every rectangle is 5 cm is longer than it's breadth.

So, if Length=L, then Breadth= L- 5

Or , if Breadth= B, then Length= B+5

or, if length is x and breadth is y ,then writing in terms of equation

→x=y+5

As you can see,there is not any proportional relationship between length and widths of these rectangles.

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3 years ago

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Maura can buy daffodil bulbs in packages of 3 for $5.37 or in packages of 2 for $4.52. How much money does she save by buying 30

fredd [130]

Answer:

$14.10

Step-by-step explanation:

To have 30 bulbs, Maura can buy 10 packages of 3 at $5.37 each, for a total of $53.70. Or, she can buy 15 packages of 2 at $4.52 each, for a total of $67.80.

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3 years ago

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Natalka [10]

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3 years ago

<img src="https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20-%204x%20%3D%207%20%7Bx%7D%5E%7B2%7D%20%20%2B%208x%20%5C%5C%20find%2

IceJOKER [234]

Answer:

${x}^{2} - 4x = 7 {x}^{2} + 8x \\ {x}^{2} - 7 {x}^{2} = 8x + 4x \\ - 6 {x}^{2} = 12x \\ - 6x = 12 \\ x = \frac{12}{ - 6} = - 2 \\ x = - 2 \\ thank \: you$

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3 years ago

I need help with these.<br> Please show how you solved them!

quester [9]

Here is your equation:

$\frac{a}{7.6} +5.5=2.9$

You're trying to find a alone. That means you need to remove everything on the same side of it. The only number(decimal) on that side is positive(+) 5.5. To remove it, you have to do the opposite, which is negative(-)5.5. Negative 5.5 is the same as subtracting 5.5.

Subtract 5.5 from both sides:

$\frac{a}{7.6} +5.5-5.5 = 2.9-5.5 \\ \\ \frac{a}{7.6}=-2.6$

Here is your new equation:

$\frac{a}{7.6} = -2.6$

To find a, you have to do the opposite of what's happening to it. In the equation, a divided by 7.6 is -2.6. The opposite of division is multiplication, That means you have to multiply 7.6 by -2.6 to find a.

Multiply:

$a = 7.6 \times -2.6 = -19.76$

Your answer will be negative because a positive times a negative is a negative.

Your answer is -19.76 ; a = -19.76

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Here is your equation:

$1.7x = 2.04$

You're trying to find x alone. That means you have to remove everything on the same side of x. In the equation, x multiplied by 1.7 is 2.04. To find x, you have to do the opposite of what's happening to it. The opposite of multiplying is dividing. That means you need to divide both sides by 1.7 so that x will be alone.

Divide by 1.7:

$\frac{1.7x}{1.7} = \frac{2.04}{1.7} \\ \\ x=1.2$

Your answer is 1.2 ; x = 1.2

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3 years ago