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3 years ago

Please Help!!!!!!!!!!!

Mathematics

2 answers:

Ostrovityanka [42]3 years ago

4 0

Answer:

C. 48.5 sq.cm

Step-by-step explanation:

1. First, find the area of the large rectangle. Area of a rectangle is length times width.

2. The size of the rectangle is 8cm by 4cm, and 8 times 4 is 32sq.cm

3. Next, find the size of the square. One of the sides is given to you (3cm), and to find the other just subtract the 4 from the 7, which also gives you 3cm.

4. 3cm * 3cm is 9sq.cm

5. The formula for the area of a triangle is length * width all divided by 2. The length of the triangle is 8 - 3 , or 5, and the width is 3. 5 * 3 = 15, and 15/2 is 7.5

6. Finally, add the areas of the separate shapes

7. 32 + 9 + 7.5 = 48.5 sq.cm

vitfil [10]3 years ago

3 0

Answer:

Step-by-step explanation:

AREA = B x W.

<em>8cm x 7cm = 56 cm^2</em>

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The probability that a certain make of car will need repairs in the first eight months is 0.6. A dealer sells three such cars. W

irina [24]

Answer:

There is a 1.8% chance that one of the cars will need a repair in the first month.

Step-by-step explanation:

It’s actually very simple, as we just have to multiply the 0.6% by 3, considering that there are three cars, and we then get the answer; 1.8%.

Hope This Helped!

5 0

3 years ago

Y= x + 4

Mice21 [21]

Answer:

Step-by-step explanation:

Simplifying

2x + 4y = 13

Solving

2x + 4y = 13

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4y' to each side of the equation.

2x + 4y + -4y = 13 + -4y

Combine like terms: 4y + -4y = 0

2x + 0 = 13 + -4y

2x = 13 + -4y

Divide each side by '2'.

x = 6.5 + -2y

Simplifying

x = 6.5 + -2y

(Hope this helped!)

6 0

3 years ago

In a chalk. If the carbon piece weighs 3g. What is the weight of the chalk?

Whitepunk [10]

Answer: the weight of chalk stick is 25 g

Step-by-step explanation:

Quantity of Carbon in chalk stick = 3 g Let the weight of chalk be x g.

12%of x =3

3 0

3 years ago

an inverted cone has a height of 11 inches and an initial radius of 18 inches. the volume of the inverted cone is decreasing at

joja [24]

Radius of cone is decreasing at the rate of $\frac{1623}{110\pi}$ inches

What is rate of change?

Suppose there is a function and there are two quantities. If one quantity of a function changes, the rate at which other quantity of the function changes is called rate of change of a function.

Here rate of change of radius of cone has been calculated

Radius of cone = 18 inches

Height of cone = 11 inches

Volume of cone (V) = $\frac{1}{3} \pi r^2h$

$\frac{dV}{dt} = \frac{1}{3} \pi h (2r\frac{dr}{dt})\\-541 = \frac{2}{3} \pi \times 11\times 5\times\frac{dr}{dt}\\\frac{dr}{dt} = -\frac{541 \times 3}{2 \times \pi \times 11 \times 5}\\\frac{dr}{dt} = -\frac{1623}{110 \pi}$

Radius of cone is decreasing at the rate of $\frac{1623}{110\pi}$ inches

To learn more about rate of change, refer to the link-

brainly.com/question/24313700

#SPJ4

5 0

2 years ago

How to solve: <img src="https://tex.z-dn.net/?f=log_%7B3%7D%20%28x%2B6%29%20%2B%20log_%7B3%7D%28x-6%29%20%3D%204" id="TexFormula

Shalnov [3]

Collapse the logarithms into one:

$\log_3(x+6)+\log_3(x-6)=\log_3((x+6)(x-6))=4$

Then write both sides as powers of 3:

$3^{\log_3((x+6)(x-6))}=3^4$

$(x+6)(x-6)=81$

Simplify the left side and solve for $x$ :

$x^2-36=81$

$x^2=117$

$x=\pm\sqrt{117}=\pm3\sqrt{13}$

But we're not done yet. Notice that both $x+6$ and $x-6$ are negative when $x=-3\sqrt{13}$ . We can't take the logarithm of a negative number (the result isn't real-valued, anyway), so we throw this solution out, and we're left with just

$x=3\sqrt{13}$

5 0

3 years ago