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3 years ago

10

55 A street vendor sells two types of newspapers, one for $.25 and the other for $.40. If she sold 100 newspapers for $28.00, ho

w many newspapers did she sell at $.25?

2 answers:

julia-pushkina [17]3 years ago

7 0

14 news papers for $0.25

Andrej [43]3 years ago

4 0

Answer: 80.

Step-by-step explanation: Confirmed by RSM teachers.

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Estimate 58% of 112 using benchmark percents. Explain your answer.

vitfil [10]

Answer:

64.96

Step-by-step explanation:

The most common benchmark percents are $0\% , 10\% , 25\% , 50\% , 75\%$ and $100\%$

We are given $58\%$ which is closest to $50\%$ .

Now we calculate $50\% \ of \ 112$ which is equal to $56$ .

We are left with $8\%$ more to add.

We can say $1\% \ of \ 112 \ is\ 1.12$

Therefore $8\% \ of \ 112 \ would \ be \ 1.12\times8=8.96$

Now add the two.

$56+8.96= 64.96$

Thus 64.96 is the answer.

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3 years ago

A scuba diver is 314 feet below the surface of the water. The angle of depression the diver makes with her boat is 39

dezoksy [38]

Answer:

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3 years ago

Find the sum of 10 + 5i and its complex conjugate.<br> Write your answer in the form a + bi

gogolik [260]

Answer:

20.

Given, complex number is 10+5i .

We need to find sum of the given complex number and its conjugate. The conjugate of 10+5i is 10-5i. Therefore, the sum will be 10+5i+10−5i=20.

7 0

2 years ago

The circumference of the ellipse approximate. Which equation is the result of solving the formula of the circumference for b?

Serhud [2]

Answer:

$b = \sqrt{\frac{C^{2} }{2(\pi )^{2} } - a^{2}}$

Step-by-step explanation:

Given - The circumference of the ellipse approximated by $C = 2\pi \sqrt{\frac{a^{2} + b^{2} }{2} }$ where 2a and 2b are the lengths of 2 the axes of the ellipse.

To find - Which equation is the result of solving the formula of the circumference for b ?

Solution -

$C = 2\pi \sqrt{\frac{a^{2} + b^{2} }{2} }\\\frac{C}{2\pi } = \sqrt{\frac{a^{2} + b^{2} }{2} }$

Squaring Both sides, we get

$[\frac{C}{2\pi }]^{2} = [\sqrt{\frac{a^{2} + b^{2} }{2} }]^{2} \\\frac{C^{2} }{(2\pi)^{2} } = {\frac{a^{2} + b^{2} }{2} }\\2\frac{C^{2} }{4(\pi)^{2} } = {{a^{2} + b^{2} }$

$\frac{C^{2} }{2(\pi )^{2} } = a^{2} + b^{2} \\\frac{C^{2} }{2(\pi )^{2} } - a^{2} = b^{2} \\\sqrt{\frac{C^{2} }{2(\pi )^{2} } - a^{2}} = b$

∴ we get

$b = \sqrt{\frac{C^{2} }{2(\pi )^{2} } - a^{2}}$

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3 years ago

How can you remember slope? in a creative way

lianna [129]

Answer:

Step-by-step explanation:

dont have a creative way but i just remember rise over run or $\frac{rise}{run}$

hope this helps <3

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3 years ago

Read 2 more answers