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3 years ago

Which of the following is the additive inverse of 1/2 -2 -1/2 2

Mathematics

2 answers:

Tanzania [10]3 years ago

8 0

So what is the multiplicative inverse of 1/2

hammer [34]3 years ago

5 0

The answer will be -1/2

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Which of the following indicates the division property of equality when solving –12x = 48?

vampirchik [111]

A is the answer because I did befor

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2 years ago

Which answer is correct?

luda_lava [24]

Answer:

The choice 210

Step-by-step explanation:

$3{[3(9 - 2)] +[7(8 - 1)] }\\ 3[3(7) + 7(7)] \\ 3[21 + 49] \\ 3[70] \\ = 210$

I hope I helped you^_^

4 0

2 years ago

Kyle's mom gave him $25 for the carnival. If his

dimulka [17.4K]

8+0.75x=25
0.75x=25(-8)
0.75x=17
17/0.75= 22.666
He can ride a total of 22 rides

7 0

2 years ago

a boat travels upstream on the allegheny river for 2 hours. the return trip only takes 1.7 hours because the boat travels 2.5 mi

Gre4nikov [31]

To solve this we are going to use the speed equation: $S= \frac{d}{t}$
where
$S$ is speed
$d$ is distance
$t$ time

We know from our problem that the upstream trip takes 2 hours, so $t_{u}=2$ . We also know that the downstream trip takes 1.7 hours, so $t_{d}=1.7$ . Notice that the distance of both trips is the same, so we are going to use $d$ to represent that distance.
Now, lets use our equation to relate the quantities:

For the upstream trip:
$S_{u}= \frac{d}{t_{u} }$
$S_{u}= \frac{d}{2}$ equation (1)

For the downstream trip:
$S_{d}= \frac{d}{t_{d} }$
$S_{d}= \frac{d}{1.7}$ equation (2)

We know that the boat travels 2.5 miles per hour faster downstream, so the speed of the boat upstream will be the speed of the boat downstream minus 2.5 miles per hour:
$S_{u}=S_{d}-2.5$ equation (3)

Replacing (3) in (1):
$S_{u}= \frac{d}{2}$
$S_{d}-2.5= \frac{d}{2}$ equation (4)

Solving for $d$ in equation (2):
$S_{d}= \frac{d}{1.7}$
$d=1.7S_{d}$ equation (5)

Replacing (5) in (4):
$S_{d}-2.5= \frac{d}{2}$
$S_{d}-2.5= \frac{1.7S_{d}}{2}$
$2(S_{d}-2.5)=1.7S_{d}$
$2S_{d}-5=1.7S_{d}$
$0.3S_{d}=5$
$S__{d}= \frac{5}{0.3}$
$S_{d}= \frac{50}{3}$ equation (6)

Replacing (6) in (5)
$d=1.7S_{d}$
$d=1.7( \frac{50}{3} )$
$d= \frac{85}{3}$ miles

We can conclude that the boat travel $\frac{85}{3}$ , which is approximately 28.3 miles, in one way.

5 0

3 years ago

When Alex and Marcus went to the store with her mom she said they could split the change evenly. The total cost of the groceries

balandron [24]

Answer:

Step-by-step explanation:

1) 3 x 20 = 60 (that how much she give)

2) 60- 57.32 = 2.68 (that the change they will split up)

3) 2.68/2=1.34 ( they will each get $1.34)

8 0

2 years ago