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marshall27 [118]

2 years ago

15

Gavin had 20 minutes to do a three-problem quiz. He spent 9 9/10 minutes on question A and 3 3/5 minutes on question B. How much

time did he have left for question C?

1 answer:

dalvyx [7]2 years ago

6 0

Answer:

6 1/2 minutes

Step-by-step explanation:

9 9/10 = 9.9

3 3/5 = 3.6

9.9 + 3.6 = 13.5

13.5 = 13 1/2

20 - 13.5 = 6.5 = 6 1/2

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konstantin123 [22]

${ \qquad\qquad\huge\underline{{\sf Answer}}}$

Here we go ~

$\qquad \sf \dashrightarrow \: \cfrac{9 {}^{(x + 1)} - 3 {}^{2x} }{4 \times 3 {}^{(2x - 1)} }$

$\qquad \sf \dashrightarrow \: \cfrac{3{}^{2(x + 1)} - 3 {}^{2x} }{4 \times 3 {}^{(2x - 1)} }$

$\qquad \sf \dashrightarrow \: \cfrac{3{}^{(2x + 2)} - 3 {}^{2x} }{4 \times 3 {}^{(2x - 1)} }$

here :

${ \sf {3}^{(2x+2)}=({3}^{2x - 1})\sdot (3³)}$

${ \sf {3}^{(2x)}=({3}^{(2x - 1)})\sdot (3¹)}$

$\qquad \sf \dashrightarrow \: \cfrac{3{}^{(2x - 1)}(3 {}^{3} - 3 {}^{1}) }{4 \times 3 {}^{(2x - 1)} }$

[ taking ${ \sf {3}^{(2x - 1)} }$ common here ]

$\qquad \sf \dashrightarrow \: \cfrac{27 {}^{} - 3 {}^{}}{4 }$

$\qquad \sf \dashrightarrow \: \cfrac{24{}^{} {}^{}}{4 }$

$\qquad \sf \dashrightarrow \: 6$

7 0

1 year ago

Read 2 more answers

10. For f(x) = 3 - 5x, find f(-5).<br> A. –22<br> B. -7<br> C. 3<br> D. 28

Artist 52 [7]

Answer:

D

Step-by-step explanation:

$3 - 5( - 5) \\ 3 - ( - 25) \\ 3 + 25 \\ 28$

4 0

2 years ago

Each of my daughters has as many brothers as sisters, but each of my sons has three times as many sisters as brothers. How many

melomori [17]

Put the number of daughters as x and number of sons as y.

For the first half of the statement:
Number of sisters any daughter has = x-1 ( because you can't be your own sibling)
Number of brothers = y

y=x-1.

For the second half:
Number of sisters any son has = x
Number of brothers any son has = y-1

3(y-1)=x

Solve as system of equations.
3y-3=x
3(x-1)-3=x
3x-3-3=x
2x=6
x=3
y=x-1=3-1=2

3 daughters and 2 sons.

Hope this helps!
Your fortune is "You can't have everything...where would you put them all?"

3 0

3 years ago

3. If Juan purchased three 24-ounce cans of motor oil for $10.80, how much did he pay per ounce?

Zina [86]

Answer: the answer is c) $.45

Step-by-step explanation: to find out how much per ounce, you need to divide the price by the quantity. so 10.80/24=.45

8 0

2 years ago

Four less than twice the square of x is 124. Which equation can be used to find the value of x?

tester [92]

2x^2-4=124 is the correct answer.

5 0

3 years ago