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3 years ago

Please help me I really need help

Mathematics

1 answer:

Murljashka [212]3 years ago

3 0

Answer:

x = 77 degrees

Step-by-step explanation:

angle x = (76 + 78)/2 = 154/2 = 77 degrees

Use the Chord angle theorems

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The top running speed of a cheetah is double the top running speed of a jackal. The top running speed of an elk is 11 miles per

rosijanka [135]

Answer:

The speed of Jackal is 35 miles per hour.

The speed of Cheetah is 70 miles per hour.

The speed of Elk is 46 miles per hour.

Step-by-step explanation:

Consider the provided information.

Let J represents the top speed of jackal.

The top running speed of a cheetah is double the top running speed of a Jackal.

This can be written as:

Cheetah = 2J

The top running speed of an elk is 11 miles per hour faster than that of a Jackal.

Elk = J + 11

If each of these three animals could run at top speed for an hour (which, of course, is not possible), they could run a combined distance of 151.

This can be written as:

$2J+J+J+11=151$

$4J=151-11$

$4J=140$

$J=35$

Hence, the speed of Jackal is 35 miles per hour.

The speed of Cheetah is 2J = 2×35 = 70

Hence, the speed of Cheetah is 70 miles per hour.

The speed of Elk is J + 11 = 35+11 = 46

The speed of Elk is 46 miles per hour.

5 0

4 years ago

NEED HELP! I ALREADY DID HALF, BUT STILL CONFUSED!

Anna35 [415]

Answer:

Step-by-step explanation:

Triangle BCZ is a right angle triangle. Triangle BCU is also a right angle triangle. Side BU is common to both triangles.

To determine m∠ZBC, we would apply the tangent trigonometric ratio.

Tan θ = opposite side/adjacent side. Therefore,

Tan B = 8/6 = 1.33

m∠ZBC = Tan^-1(1.33) = 53.06

m∠UBC = m∠ZBC/2 = 26.53

To determine CU, we would apply

the tangent trigonometric ratio.

Therefore,

Tan 26.53 = CU/6

CU = 6Tan26.53

CU = 6 × 0.4992

CU = 2.9952

8 0

3 years ago

Write the word sentence as an inequality: a number b is at least -3

alekssr [168]

b > 3
_

Pretend that the line is right below the greater than sign.

7 0

3 years ago

What is the solution of the equation when solved over the complex numbers?

kumpel [21]

Answer:

$x=+i\sqrt{20}\approx+4.472i$

$x=-i\sqrt{20}\approx-4.472i$

Step-by-step explanation:

Starting from $x^2+20=0$ , we do $x^2=-20$ , which means $x=\pm\sqrt{-20}$ , which can be written as $x=\pm\sqrt{(-1)(20)}$ , which gives us $x=\pm\sqrt{(-1)}\sqrt{(20)}$ , which we know is $x=\pm i \sqrt{(20)}$ , so our solutions are:

$x=+i\sqrt{(20)}$

$x=-i\sqrt{(20)}$

Which can be approximated to:

$x\approx+4.472i$

$x\approx-4.472i$

3 0

4 years ago

What is the simplified form of ether following expression ?

Nastasia [14]

76828262638292827273737373 there

5 0

3 years ago

Read 2 more answers