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3 years ago

15

A marching band was in a parade. the band members marched in 8 rows. there were 6 band members in each row. explain how the fact

that 5 x 6=30 can help you find 8 x 6.

1 answer:

natta225 [31]3 years ago

6 0

If 5 x 6 = 30 you can figure out 8 x 6 by adding 6 three times to 30!

30 + 6 = 36

36 + 6 = 42

42 + 6 = 48 <-- the answer is 48!

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19. There were 20 drinks in a cooler.

ella [17]

For this case we have that the complete question is:

There were 20 drinks in a cooler. Joey drank 15% of the drinks. Sandra drank 1/5 of the drinks. Hannah drank 1/4 of the drinks. Tammy drank 30% of the drinks. How many drinks are left in the cooler? a 0 b 2 c 5 d 9

We propose a rule of three:

20 ---------> 100%

x ------------> 15%

Where the variable "x" represents the amount of drinks equivalent to 15%.

$x = \frac {15 * 20} {100}\\x = 3$

So, Joey drank 3 drinks.

On the other hand, we have that Sandra drank $\frac {1} {5}$ of the drinks:

$20 * \frac {1} {5} = \frac {20} {5} = 4$

Thus, Sandra drank 4 drinks.

In addition, Hannah drank $\frac {1} {4}$ of the drinks:

$20 * \frac {1} {4} = 5$

So Hannah drank 5 drinks.

Finally, Tammy drank 30% of the drinks:

20 ---------> 100%

y ------------> 30%

Where the variable "y" represents the amount of drinks equivalent to 30%.

$y = \frac {30 * 20} {100}\\y = 6$

So Tammy drank 6 drinks.

Adding up we have:

$3 + 4 + 5 + 6 = 18$

So: $20-18=2$

Thus, 2 drinks remain in the refrigerator.

Answer:

Option B

5 0

3 years ago

Help me plzz and thank u sm

vladimir2022 [97]

Answer:

The equation of the axis of symmetry is x = 7

Step-by-step explanation:

Mathematically, we have the equation of the axis of symmetry as;

x = -b/2a

where a is the coefficient of x^2 = 1

b is the coefficient of x which is -14

So, the equation of the axis of symmetry will be;

x = -(-14)/2(1) = 14/2 = 7

So the equation of the axis of symmetry is x =7

6 0

2 years ago

The parent function f(x) = x^2 is vertically stretched by a scale factor of 2, translated 14 units right, and 6 units up. Which

Elena-2011 [213]

Answer:

$(1)\; G(x)=2(x-14)^2+6$

Step-by-step explanation:

Assuming, right and up are positive directions.

The given parent function, $f(x)=x^2$

Let $f_1(x)$ be the function when the parent function is stretched by a scale factor of 2.

So, $f_1(x)=2f(x)$

$\Rightarrow f_1(x)=2x^2$

Let $f_2(x)$ be the function when $f_1(x)$ is translated $14$ units right.

So, $f_2(x)=f_1(x-14)$

$\Rightarrow f_2(x)=2(x-14)^2$

Again, let $f_3(x)$ be the function when $f_2(x)$ is translated 4 units up.

So, $f_3(x)=f_2(x)+6$

$\Rightarrow f_3(x)=2(x-14)^2+6$

So, the resulting function, $f_3(x)=G(x)=2(x-14)^2+6$ .

Hence, option (1) is correct.

4 0

3 years ago