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3 years ago

If n ll m, find the value of x and the value of z.

Mathematics

1 answer:

aliina [53]3 years ago

7 0

Answer: A

Explanation: the two triangles are proportional, so find the “proportion” between the two sides
12/4=3
3*3=9
3z=6

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2. What is the distance between the points M(-8,11) and N(3,7)?

ivolga24 [154]

Answer:

I'm not sure I feel like it's A

Step-by-step explanation:

-8 is 11 units away from 3 but I do not know where the 7 came from for answer A.

If I were you I would not trust my answer

6 0

3 years ago

Need help please help

lilavasa [31]

Answer:

27 of the pets are dogs.

Step-by-step explanation:

Real easy way to do this, treat 45 (the total) as 100. So, do 45/100 then multiply the result of that by 60, and you end up with 27.

45/100=0.45

0.45*60=27

7 0

3 years ago

The radii of earth and Pluto are 6,371 kilometers and 1161 kilometers, respectively. Approximately how many spheres the size of

miskamm [114]

Answer:

165

Step-by-step explanation:

Here we have to use the ratio.

Both earth and Pluto are in similar shapes.

To find the number of sphere the size of Pluto does it take to have the same volume, we need to divide the earth's volume by Pluto's volume.

= Earth's volume/Pluto's volume

= 4/3 π (6371)^3 ÷ 4/3 π (1161)^3

Cancelling out 4/3 π both in the numerator and in the denominator, we get

= (6371)^3 ÷ (1161)^3

= 258596602811 ÷ 1564936281

= 165.24

Approximately 165 spheres the size of Pluto to cover the earth volume.

Thank you.

8 0

4 years ago

Read 2 more answers

Differentiate... How to solve this type of problem? y = cos^2(x^2 + x^3)

Licemer1 [7]

Answer:

$\frac{d y}{d x} = - (2 x + 3 x^{2} )sin2(x^{2} +x^{3})$

Step-by-step explanation:

Step(i):-

Given y = cos² (x² + x³) ....(i)

By using differentiation formulas

a) $\frac{d}{dx} (cosx) = -sinx$

b) $\frac{d}{dx} (x^{n} ) = n x ^{n-1}$

Step(ii):-

Differentiating equation (i) with respective to 'x'

First apply formula $\frac{d}{dx} (x^{n} ) = n x ^{n-1}$

$\frac{d y}{d x} = 2 cos (x^{2} +x^{3} )^{2-1} \frac{d}{d x} (cos(x^{2} +x^{3})$

Now we will apply formula

$\frac{d}{dx} (cosx) = -sinx$

$\frac{d y}{d x} = 2 cos (x^{2} +x^{3} ) (-sin(x^{2} +x^{3})\frac{d}{dx} (x^{2} +x^{3} )$

Again apply formula $\frac{d}{dx} (x^{n} ) = n x ^{n-1}$

$\frac{d y}{d x} = 2 cos (x^{2} +x^{3} ) (-sin(x^{2} +x^{3}) (2 x + 3 x^{2} )$

$\frac{d y}{d x} = -2 sin (x^{2} +x^{3} ) cos(x^{2} +x^{3}) (2 x + 3 x^{2} )$

we know that trigonometric formulas

Sin 2θ = 2 sinθ cosθ

$\frac{d y}{d x} = -sin2(x^{2} +x^{3}) (2 x + 3 x^{2} )$

Final answer:-

$\frac{d y}{d x} = - (2 x + 3 x^{2} )sin2(x^{2} +x^{3})$

6 0

3 years ago

How much is 2000X158

Greeley [361]

Answer:

it is 316,000

8 0

3 years ago

Read 2 more answers