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3 years ago

12

Sonji paid $25.00 for two scarves, which were different prices. When she got home she could not find the receipt. She

2 answers:

Nimfa-mama [501]3 years ago

8 0

Let the less expensive scarf be x

expensive scarf = $3 + x

According To The Question,

x+x+$3=$25

2x+$3=25

2x=22

x=$11

expensive scarf = x + $3 = $11 + $3 = $14

HOPE THIS WILL HELP YOU

Aleks04 [339]3 years ago

5 0

Answer:

$14

Step-by-step explanation:

Sony paid for two scarves = $ 25

We are given that one scarf cost $3 more than the other

Let the cost of one scarf be x

So, cost of another scarf = x+3

Since the total cost is $25

So, $x+x+3=25$

$2x+3=25$

$2x=22$

$x=\frac{22}{2}$

$x=11$

So, cost of one scarf = $11

Cost of another scarf = x+3=11+3=14

Hence the cost of the expensive scarf is $14

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The workers in a senate office said that they received about 700 phone calls from

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Answer:

672

Step-by-step explanation:

anything lower then 5 or in this case 50 would round down so 649 rounds to 600 anything higher would round up 672 to 709 763 to 800 and 751 to 800

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3 years ago

We are studying the proportion of cities that have private garbage collector. We want a maximum error of 0.10 and a 95% confiden

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Answer:

The minimum number of cities we need to contact is 96.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence interval $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

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The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence interval

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

In this problem, we have that:

$p = 0.5, M = 0.1$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.1 = 1.96*\sqrt{\frac{0.5*0.5}{n}}$

$0.1\sqrt{n} = 0.98$

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2 years ago

Frank purchased a new ice box having 2kg capacity. He wants it to be full with ice cubes. He measured the ice cubes to be 3.5 cm

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Answer:

Frank can put 5 cubes in the box.

Step-by-step explanation:

Formula:

Mass = Volume × density.

1 cubic centimetre = 0.001 liter= 1 millilitre

Given that,

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So,the mass of the cubes is 2 kg.

Each ice cubes measured 3.5 cm by 3.5 cm by 3.5 cm.

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The volume of a each ice cubes is = $3.5^3$ cm³

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The mass of each cubes are

=volume of each ice cubes × density

=42.875 ml ×0.914 g/ml

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39.18775x=2,000

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3 years ago

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3 years ago

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Answer:

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Simplify $\bold{-\left(-5ab+4b^2+3a^2\right)}$

$\bold{5ab-4b^2-3a^2}$

Rewrite Equation:

$\bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}$

Simplify $\bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}$

$\bold{2a^2+9ab-7b^2}$

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3 years ago

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