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3 years ago

HELPPPPP I DONT KNOW THIS

Mathematics

2 answers:

blsea [12.9K]3 years ago

8 0

C
20% increase

$50 + 20% = $60

Marta_Voda [28]3 years ago

4 0

Answer:

C. 20% increase

Step-by-step explanation:

Process of Elimination: Remove options A and B from the answer choices since 60 > 50, so it can't be a decrease.

We're left with 20% and 25%

To represent 20%, do .2 x 50 which gives you 10.

If 10 + 50 = 60, then it was a 20% increase. Which 10 + 50 is 60.

So the answer is 20% increase.

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Please prove it for me

grigory [225]

Answer:

see explanation

Step-by-step explanation:

Using the trigonometric identity

tanx = $\frac{1}{cotx}$

Consider the left side

$\frac{cotA-1}{cotA+1}$ ← divide terms on numerator/denominator by cotA

= $\frac{\frac{cotA}{cotA}-\frac{1}{cotA} }{\frac{cotA}{cotA}+\frac{1}{cotA} }$

= $\frac{1-tanA}{1+tanA}$

= right side , thus proven

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2 years ago

A bag contains 7 pears and 3 apples. If you select 2 pieces of fruit without looking, how many ways can you get 2 pears.

enot [183]

Answer:

There are 2 ways, since we'd chosen 2 fruits

PROBABILITY:

( $\frac{2}{10}$ = $\frac{1}{5}$ ) or $\frac{1}{10}$

METHOD:

In the 2 fruits we took both of them might be pears either maybe one of them can be a pear. The same is possible with the other fruit.

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6 0

3 years ago

If two triangles are similar, which pair of conditions must be true?

SVEN [57.7K]

I think its sides ae congruent and sides are congruent

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2 years ago

The wavelength of violet light is 4.0 x 10^−7 m. The wavelength of red light is 6.5 x 10^−7 m. How much longer is the wavelength

AnnyKZ [126]

Answer:

A 2.5 × 10^–7 m

Step-by-step explanation:

Given

wavelength of violet light = 4.0 x 10^−7 m.

The wavelength of red light = 6.5 x 10^−7 m

To find the how much longer is wavelength of red light than violet light we have to find difference of wavelength of red and violet light

Difference in wavelength of red light and violet light =

wavelength of red light -wavelength of violet light

= 6.5 x 10^−7 m - 4.0 x 10^−7 m

Difference in wavelength of red light and violet light = (6.5 - 4.0)*10^−7 m

Difference in wavelength of red light and violet light =2.5 x 10^−7 m

Thus,

wavelength of red light is 2.5 x 10^−7 m longer than wavelength of violet light

option A

8 0

2 years ago

The graph shows the proportions of blue paint and yellow paint that Briana mixes to make green paint. What is the slope of the l

kotegsom [21]

Answer:

Slope = ⅚

Step-by-step explanation:

Using the coordinates of two points in the graph, say (0, 0) and (6, 5).

$\frac{y_2 - y_1}{x_2 - x_1} = \frac{5 - 0}{6 - 0} = \frac{5}{6}$

The slope of the graph is ⅚.

The slope represents the ratio of proportion of yellow paint to blue paint that must be mixed together to produce green paint.

This means, to make green paint, for every 5 parts of yellow paint, 6 parts of blue paint is required to be added as a mixture.

6 0

2 years ago