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3 years ago

Answer please hurry i need it

Mathematics

1 answer:

Snezhnost [94]3 years ago

4 0

Answer:

Step-by-step explanation:

x+12 = 9+2x +3

x = 12-12

x = 0

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Three bananas cost $.99 at this rate how much do five bananas cost

enyata [817]

Answer:

$1.65

Step-by-step explanation:

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3 years ago

The length of each side of an equilateral triangle is increased by 20%, resulting in triangle ABC. If the length of each side of

kompoz [17]

Answer: Area of ΔABC is 2.25x the area of ΔDEF.

Step-by-step explanation: Because equilateral triangle has 3 equal sides, area is calculated as

$A=\frac{\sqrt{3} }{4} a^{2}$

with a as side of the triangle.

Triangle ABC is 20% bigger than the original, which means its side (a₁) measures, compared to the original:

a₁ = 1.2a

Then, its area is

$A_{1}=\frac{\sqrt{3} }{4}(1.2a)^{2}$

$A_{1}=\frac{\sqrt{3} }{4}1.44a^{2}$

Triangle DEF is 20% smaller than the original, which means its side is:

a₂ = 0.8a

So, area is

$A_{2}=\frac{\sqrt{3} }{4} (0.8a)^{2}$

$A_{2}=\frac{\sqrt{3} }{4} 0.64a^{2}$

Now, comparing areas:

$\frac{A_{1}}{A_{2}}= (\frac{\sqrt{3}.1.44a^{2} }{4})(\frac{4}{\sqrt{3}.0.64a^{2} } )$

$\frac{A_{1}}{A_{2}} =$ 2.25

The area of ΔABC is 2.25x greater than the area of ΔDEF.

7 0

2 years ago

PLEASE HELP ME ! (I AM TERRIBLE AT MATH)

Mashutka [201]

It looks as though there are 25 21-40 year-olds. 40% of 25 is 10, this is the amount that are AGAINST the increase. Therefore the ones in favor for the increase must be 25 - 10 = 15.

You should be able to follow the same process to get the 41-60 year-olds against an increase. Just be sure to read the given information carefully

4 0

3 years ago

Read 2 more answers

Determine the x- and y-

rjkz [21]

Answer and working out attached, hope this helps