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notsponge [240]
3 years ago
10

Nina already owns 2 necklaces, and additional necklaces are priced at 2 for a dollar. How much money does Nina need to spend on

new necklaces in order to own a total of 6 necklaces? Write and solve an equation to find the answer.
Mathematics
1 answer:
dalvyx [7]3 years ago
7 0

Answer:

Money required=\$ 8

Step-by-step explanation:

Nina already owns 2 necklaces and she wants to have total 6 necklaces.

Number of necklaces she needs more=6-2=4

Price of 1\ necklaces=\$2

Let Nina needs \$ x to buy 4 more necklaces=

Money required to buy 4\ necklaces=cost\ of\ 1\ necklace\times number\ of\ necklaces

x=2\times 4\\x=\$ 8

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During the first hour of operation the farm stand owner sold 15% of the apples he had. On the second hour he sold 20% of the rem
zzz [600]

Answer:

38.25 kg

Step-by-step explanation:

Let the number of apples sold = x

Now, on the first hour he sold 15% of the apples i.e. he sold 0.15x kg of apples.

So, the remaining apples = x - 0.15x = 0.85x

Further, on the second hour he sold 20% of the remaining apples i.e. he sold 0.20 × 0.85x = 0.17x kg of apples.

Thus, the remaining apples = 0.85x - 0.17x = 0.68x

Then, on the third hour he sold 25% of the remaining apples i.e. he sold 0.25 × 0.68x = 0.17x kg of apples.

So, the remaining apples = 0.68x - 0.17x = 0.51x

Moreover, on the fourth hour he will sell 30% ( i.e. 5% more of 25% ) of the remaining apples i.e. he sold 0.30 × 0.51x = 0.153x kg of apples.

As, during the second hour, he sold 25.5 kg of apples.

Then, 0.17x = 25.5 i.e. x=\frac{25.5}{0.17} i.e. x = 250

Hence, during the fourth hour, he will sell 0.153x = 0.153 × 250 = 38.25 kg of apples.

7 0
3 years ago
System of Equations<br><br> y=-x-1<br> y+x=3<br><br> Solve?
ozzi
Solve by substitution

\sf{y=-x-1}
\sf{y+x=3}

Just plug in y=-x-1 into y+x=3

So we get:

\sf{(-x-1)+x=3}

Simplify that:

\sf{-1=3}

And since that is not true, that means this system of equations has no solutions!
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3 years ago
PLEASE HELP WILL GIVE BRAINLIEST!!! What does the degree of a polynomial expression tell you about its related polynomial functi
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SOVA2 [1]

Answer:

Step-by-step explanation:

mid point formula = (x1+x2/2 , y1+y2/2)

hence putt the values we get,

mid point = ( -1+3/2 , 7-2/2)

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3 years ago
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Step-by-step explanation:

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3 years ago
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