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3 years ago

Con un diámetro de 4x y un ares de 28.26cm cual es el valor de X

Mathematics

1 answer:

ASHA 777 [7]3 years ago

5 0

Answer:

2826/25

Step-by-step explanation:

28.26×4=========2826/25

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A scale model of a street sign is in the shape of a triangle. The base is 4.25 cm and the height is 8.8 cm what is the area of t

agasfer [191]

Answer:

18.7 cm²

Step-by-step explanation:

To work out the area of a triangle you have to use the formula

$\frac{1}{2} * B * H$

Where "B" is the base and "H" is the height

Since these are decimals, I like to convert them into fractions which makes them easier to calculate with

The base is 4.25 cm which will turn into $4\frac{1}{4}$

The height is 8.8 cm which will turn into $8\frac{8}{10}$

Now we use the formula

$\frac{1}{2} * B * H$

$\frac{1}{2} * 4\frac{1}{4} *8\frac{8}{10}$

→ Convert to improper fractions

$\frac{1}{2} * \frac{17}{4} *\frac{88}{10}$

→ Simplify

$\frac{187}{10}$

→ Convert into decimal

18.7

7 0

3 years ago

Monster Mike's truck decelerates from 72 m/s to 0 m/s in 6 seconds. What is his rate of deceleration?

mel-nik [20]

Answer:

this may be wrond but I think it is -12 m/s

Step-by-step explanation:

$72/6=12$

5 0

3 years ago

In a rectangle, the length is √68 meters and the width is √17+9 meters. What is the area?

Elena L [17]

Answer:

Step-by-step explanation:

Area for rectangle is A=b×h

You can only multiply radicals with other radicals so... √17×√68= √1156

Simplify radical

√1156= 34

Then add 9

34+9= 43

7 0

3 years ago

A trust fund worth $25,000 is invested in two different portfolios. This year, one portfolio is expected to earn 5.25% interest

solong [7]

Answer:

$12 000 in Portfolio 1 and $13 000 in Portfolio 2

Step-by-step explanation:

The formula for simple interest is

I = Prt

For each portfolio, t = 1 yr

For Portfolio 1, i = 5.25 % = 0.0525

For Portfolio 2, i = 4 % = 0.04

Let x = amount invested in Portfolio 1. Then

25 000 - x = amount invested in Portfolio 2 and

$\begin{array}{rcr}0.0525x + 0.04(25000- x) & = & 1150\\0.0525x+ 1000 - 0.04x & = & 1150\\0.0125x + 1000 & = & 1150\\0.0125x & = & 150\\x & = & 12000\\\end{array}$

25 000 - x = 25 000 - 12 000 = 13 000

So, $12 000 is invested in Portfolio 1 and $13 000 is invested in Portfolio 2.

Check:

$\begin{array}{rcl}0.0525 \times 12000 + 0.04(25000 - 12000)& = & 1150\\630 + 0.04(13000) & = & 1150\\630 + 520 & = & 1150\\1150 & = & 1150\\\end{array}$

OK.

4 0

4 years ago

Write the equation of the circle centered at (-4,3) with a radius of 7

Harrizon [31]

Answer:

(x + 4)² + (y - 3)² = 49

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

Here (h, k) = (- 4, 3) and r = 7 , thus

(x - (- 4))² + (y - 3)² = 7² , that is

(x + 4)² + (y - 3)² = 49

5 0

3 years ago