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3 years ago

Please help answer Will give Brainlst

Mathematics

2 answers:

krok68 [10]3 years ago

4 0

Answer:

Step-by-step explanation:

Solve this equation use the Pythagorean theorem: a² + b² = c²

Because we know the values of c and a, we can simplify the equation before even plugging in the values: b = √(c² - a²)

Now, plug in the known values and simplify to solve for the unknown:

$b = \sqrt{ (60^{2} - 48^{2})}$

$b =\sqrt{ 3600 -2304}$

$b = \sqrt{1292}$

$b = 36$

Deffense [45]3 years ago

4 0

It’s 70. Hope that helps.

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Carol is going to make a wooden pyramid and then paint it. She drew the net of a square pyramid as shown below to help her plan

rodikova [14]

The given pyramid's total surface area is 3. 24.0 square feet.

Step-by-step explanation:

Step 1:

To calculate the surface area of the given figure, we need to find the surface areas of the different shapes in the figure.

There are 3 triangles and 1 square in the figure.

Step 2:

All the triangles are similar.

The surface area of a triangle = $\frac{1}{2} (baselength)(height).$

The similar triangles have a base length of 3 feet and a height of 2.5 feet.

The surface area of 1 similar triangle = $\frac{1}{2} (3)(2.5)= 3.75$ square feet.

The surface area for all the similar triangles = $3.75 (4) = 15$ square feet.

Step 3:

The surface area of a square is the square of its side length. The square has a side length of 3 feet.

The surface area of the square = $a^{2} = 3^{2} =9$ square feet.

Step 4:

To calculate the total surface area we sum up all the individual surface area.

The total surface area = $15 + 9 = 24$ square feet which is the third option.

3 0

2 years ago

Helpppp will mark brainliest.

Tju [1.3M]

8 ^ (-2) = 1 / 64
4 ^ (-3) = 1 / 64

4 0

3 years ago

What is x for these qs 2x+7=3 1/2x-4=5 10-2x=5

qwelly [4]

Answer:

Step-by-step explanation:

1)=-2

2)=18

3)=2.5

3 0

3 years ago

Read 2 more answers

At noon, ship A is 130 km west of ship B. Ship A is sailing east at 25 km/h and ship B is sailing north at 20 km/h. How fast is

Hitman42 [59]

Answer:

answer = 12.87 km/h

Step-by-step explanation:

Given

Ship A is sailing east at 25 km/h = $\frac{dx}{dt}$

ship B is sailing north at 20 km/h = $\frac{dy}{dt}$

here x and y are the sailing at t = 4 : 00 pm for ship A and B respectively

so we get x = 4 ×25 =100 km/h

y = 4× 20 = 80 km/h

let z is the distance between the ships, we need to find $\frac{dz}{dt}$ at t = 4 hr

At noon, ship A is 130 km west of ship B (12:00 pm)

so equation will be

$z^2 = (130-x)^2 + y^2......................(i)\\put x = 100 and y = 80 \\\\we | | get \\$

$z^2 = 30^2 + 80^2\\z =\sqrt{7300} km/h$

derivative first equation w . r. to t we get

$2z\frac{dz}{dt} =$ $-2(130-x)\frac{dx}{dt}$ $+2y\frac{dy}{dt}$

$\frac{dz}{dt} =\frac{1}{z}[(x -130)\frac{dx}{dt} +y\frac{dy}{dt}]$

$\frac{dz}{dt} = \frac{( -20\times25 + 80\times20)}{\sqrt{7300} }$

$= \frac{1100}{85.44}\\ = 12.87km/h$

8 0

2 years ago

1. The spinner shown has six congruent sections.

kondaur [170]

Answer:

Step-by-step explanation:

The probability of obtaining a 3 is

P(3) = $\frac{1}{6}$

Then after 30 spins the predicted number of times it should land on 3 is

30 × $\frac{1}{6}$ = 5

8 0

1 year ago