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amid [387]
2 years ago
6

Hayden has 7 shells . Elly has 5 fewer shells than Hayden . Beth has 2 shells . How many shells do they have in all?

Mathematics
1 answer:
sleet_krkn [62]2 years ago
5 0

Answer:

11 i think

Step-by-step explanation:

You might be interested in
The tens digit is three less than the units digit. If the digits are reversed, the sum of the reversed number and the original n
muminat

Answer:

Original number is 47

Step-by-step explanation:

Given: The tens digit is three less than the units digit. If the digits are reversed, the sum of the reversed number and the original number is 121.

To find: the original number

Solution:

Let x denotes digit at ones place.

As the tens digit is three less than the units digit,

Digit at tens place = x-3

Original number = 10(x-3)+x=11x-30

When digits are reversed,

Reversed number = 10x+(x-3)=11x-3

As the sum of the reversed number and the original number is 121,

11x-30+11x-3=121\\22x-33=121\\22x=154\\x=\frac{154}{22}\\=7

So,

original number = 11x-30=11(7)-30=77-30=47

8 0
3 years ago
Before you answer, make sure to do a step by step explanation, if you forget, it's whatever. I'll give crowns to the people that
katen-ka-za [31]

Answer: 36.84

(lmk if this isnt right)

Step-by-step explanation:

To find the perimeter of the rectangle:

3+3+3+3+3+3=18

or

3(6)=18

To find the diameter of the circle:

12-(3+3)

12-6=6

You can combine the 2 half circles to make 1 full circle since they both have the same diameter. Use the circumference formula to solve.

C=πd

Substitute

C=3.14(6)

Multiply

C=18.84

Add the perimeter of the rectangle and the circumference of the circle.

18+18.84=36.84

4 0
3 years ago
חן
N76 [4]

Answer:

Step-by-step explanation:

This is a fascinating question. It turns out to be true because of the relationship between a 30 degree angle and a 60 degree angle

The answer is that the product of sin30*sin60 = cos(30)*cos(60). This happens because sin(60) = cos(90-60) = cos(30)

Other angles will do the same thing sin36 * sin54 = cos(54)*cos(36)

8 0
2 years ago
The radius of a right circular cone is increasing at a rate of 1.5 in/s while its height is decreasing at a rate of 2.1 in/s. At
givi [52]

Answer:

The volume of the cone is changing at a rate of approximately 8670.796 cubic inches per second.

Step-by-step explanation:

Geometrically speaking, the volume of the right circular cone (V), in cubic inches, is defined by the following formula:

V = \frac{1}{3}\cdot \pi \cdot r^{2}\cdot h (1)

Where:

r - Radius, in inches.

h - Height, in inches.

Then, we derive an expression for the rate of change of the volume (\dot V), in cubic inches per second, by derivatives:

\dot V = \frac{1}{3}\cdot \pi \cdot (2\cdot r\cdot h \cdot \dot r + r^{2}\cdot \dot h) (2)

Where:

\dot r - Rate of change of the radius, in inches per second.

\dot h - Rate of change of the height, in inches per second.

If we know that r = 120\,in, \dot r = 1.5\,\frac{in}{s}, h = 107\,in and \dot h = -2.1\,\frac{in}{s}, then the rate of change of the volume is:

\dot V \approx 8670.796\,\frac{in^{3}}{s}

The volume of the cone is changing at a rate of approximately 8670.796 cubic inches per second.

8 0
3 years ago
( using the quadrata formula solve 282 +15% +750​
Molodets [167]

Step-by-step explanation:

Q.282 +15% +750

<em><u>282 +15 </u></em><em><u>/</u></em><em><u>1</u></em><em><u>0</u></em><em><u>0</u></em><em><u>+750</u></em>

<em><u>2</u></em><em><u>8</u></em><em><u>2</u></em><em><u>+</u></em><em><u>3</u></em><em><u>/</u></em><em><u>2</u></em><em><u>0</u></em><em><u>+</u></em><em><u>7</u></em><em><u>5</u></em><em><u>0</u></em>

<em><u>1</u></em><em><u>0</u></em><em><u>3</u></em><em><u>2</u></em><em><u>+</u></em><em><u>3</u></em><em><u>/</u></em><em><u>2</u></em><em><u>0</u></em>

<em><u>2</u></em><em><u>0</u></em><em><u>6</u></em><em><u>4</u></em><em><u>3</u></em><em><u>/</u></em><em><u>2</u></em><em><u>0</u></em>

5 0
3 years ago
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