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vazorg [7]
3 years ago
7

Mike bought 7 new baseball trading cards to add to his collection. His dog ate half of his collection. There are now only 25 car

ds left. How many cards did Mike have to start with?
Mathematics
1 answer:
RSB [31]3 years ago
6 0

Answer:50

Step-by-step explanation:

Bc 25+25 is 50.

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How do you write 186.1 in scientific notation? ____× 10^____
Anvisha [2.4K]

Answer:

1.861(10²)

Step-by-step explanation:

Proper scientific notation only has the ones place and decimals. To get the same value again, we would need the exponent to be 2 and not -2.

7 0
3 years ago
Find the z-score such that the area under the standard normal curve to the left is 0.79.
Varvara68 [4.7K]

Answer:

1

Step-by-step explanation:

hope this helps

8 0
3 years ago
Prove that :( 1 + 1/<img src="https://tex.z-dn.net/?f=tan%5E%7B2%7DA" id="TexFormula1" title="tan^{2}A" alt="tan^{2}A" align="ab
Aliun [14]

Answer:

See explanation

Step-by-step explanation:

Simplify left and right parts separately.

<u>Left part:</u>

\left(1+\dfrac{1}{\tan^2A}\right)\left(1+\dfrac{1}{\cot ^2A}\right)\\ \\=\left(1+\dfrac{1}{\frac{\sin^2A}{\cos^2A}}\right)\left(1+\dfrac{1}{\frac{\cos^2A}{\sin^2A}}\right)\\ \\=\left(1+\dfrac{\cos^2A}{\sin^2A}\right)\left(1+\dfrac{\sin^2A}{\cos^2A}\right)\\ \\=\dfrac{\sin^2A+\cos^2A}{\sin^2A}\cdot \dfrac{\cos^2A+\sin^A}{\cos^2A}\\ \\=\dfrac{1}{\sin^2A}\cdot \dfrac{1}{\cos^2A}\\ \\=\dfrac{1}{\sin^2A\cos^2A}

<u>Right part:</u>

\dfrac{1}{\sin^2A-\sin^4A}\\ \\=\dfrac{1}{\sin^2A(1-\sin^2A)}\\ \\=\dfrac{1}{\sin^2A\cos^2A}

Since simplified left and right parts are the same, then the equality is true.

3 0
3 years ago
A map has a scale of 5 in. = 15 mi. If you measured the distance between two cities to be 26 in. On the map, how many miles woul
Reil [10]

Answer:

Actual distance between the two cities given on the map = 78.0 miles

Step-by-step explanation:

Scale used for the actual distance between two cities on a map is,

5 in. = 15 mi.

\frac{5}{15} in. = \frac{15}{15} mi.

1 mi. = \frac{1}{3} in.

1 inch = 3 miles

Therefore, 26 inches on the map = 26 × 3

                                                        = 78 miles

Therefore, actual distance between the two cities given on the map = 78.0 miles

5 0
3 years ago
Another fairly simple one, pretty much a free Brainliest and 30 points.
Alchen [17]

Answer:

Solution given:

8\frac{7}{12}-3\frac{1}{3}=\frac{8*12+7}{12}-\frac{3*3+1}{3}

=\frac{103}{12}-\frac{10}{3}

taking lcm

=\frac{103-10*4}{12}=\frac{63}{12}=\frac{21}{4}=5\frac{1}{4}

7 0
2 years ago
Read 2 more answers
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