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2 years ago

Need help please!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Valentin [98]2 years ago

7 0

Answer:

The correct answer is -2/9

Step-by-step explanation:

You can solve this by simply multiplying 5/6 and -4/15:

$\frac{5}{6} * \frac{-4}{15}\\= \frac{-20}{90}\\= \frac{-2}{9}$

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A scale drawing of a rectangular painting has a scale factor of 1:4 which statements are true

vovikov84 [41]

Answer:

object have been reduced by a factor of 4 on paper or the drawing have been increased by a factor of 4 on land .

Step-by-step explanation:

What a scale factor of 1:4 means.

Simply it means that the reals size of the object on land have been reduced in the drawing in the paper.

Now for scale factor of 1:4 in particular it means that the object have been reduced by a factor of 4 on paper or the drawing have been increased by a factor of 4 on land .

Example if the drawing has measurements of 4 inches on paper, then on land it will be 16 inches

5 0

3 years ago

What is the value of cosθ given that (−2, −3) is a point on the terminal side of θ ?

snow_tiger [21]

Answer:

-0.555

Step-by-step explanation:

The terminal point of the vector in this problem is

(-2,-3)

So, it is in the 3rd quadrant.

We want to find the angle $\theta$ that gives the direction of this vector.

We can write the components of the vector along the x- and y- direction as:

$v_x = -2\\v_y = -3$

The tangent of the angle will be equal to the ratio between the y-component and the x-component, so:

$tan \theta = \frac{v_y}{v_x}=\frac{-3}{-2}=1.5\\\theta=tan^{-1}(1.5)=56.3^{\circ}$

However, since we are in the 3rd quadrant, the actual angle is:

$\theta=180^{\circ} + 56.3^{\circ} = 236.3^{\circ}$

So now we can find the cosine of the angle, which will be negative:

$cos \theta = cos(236.3^{\circ})=-0.555$

7 0

2 years ago

How do I find the inverse of the function? Also, is it a function and why?

yaroslaw [1]

Answer:

Step-by-step explanation:

Essentially, begin by flipping the x and y terms:

x = (1 - 2y)^2 + 5

Then, solve for y:

$\ x = (1-2y)^2 + 5\\\sqrt{x-5} = 1 - 2y\\\sqrt{x-5} - 1 = 2y\\\frac{\sqrt{x-5} - 1}{2} = y^-1\\$

Because we know there is only 1 y-value for any given x-value, the inverse of the given function is also a function.

4 0

3 years ago

Kira received a $80 gift card for a coffee store. She used it in buying some coffee that cost $8.03 per pound. After buying the

never [62]

Answer:

5 pounds

Step-by-step explanation:

80 - 39.85 = 40.15

40.15 ÷ 8.03

= 5

3 0

1 year ago

Pls help me do you know the answer let me know

FrozenT [24]

Answer:

Are you telling us to answer it all?

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers