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3 years ago

Solve and simplify: 4 1/2 x 2 1/3 A.9/2 B.7/3 C.63/6 D.10 1/2

Mathematics

2 answers:

vichka [17]3 years ago

6 0

Answer:

The answer is D. 10 1/2

Step-by-step explanation:

igor_vitrenko [27]3 years ago

5 0

Answer: 10 1/2

Step-by-step explanation:

Convert all mixed numbers into improper fractions

4 1/2 = 9/2

2 1/3 = 7/3

Now multiply 9/2 * 7/3

9*7=63

2*3=6

Get 63/6

Divide 63 and 6 and get 10.5

10.5 will equal to 10 1/2

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Please help me with this problem. I'm kind of stuck and don't know what to do.

Flauer [41]

Try this option:

1) if csc(u)=9, then 1/sin(u)=9 and sin(u)=1/9;

2) if sin(u)=1/9, then cos(u):

$cos(u)=\sqrt{1-sin^2(u)}=\sqrt{1-\frac{1}{81}}=\frac{4\sqrt{5}}{9};$

3) $if \ sin(u)=\frac{1}{9} \ and \ cos(u)=\frac{4\sqrt{5}}{9}, then$

$sin(2u)=2sin(u)*cos(u)=\frac{8\sqrt{5}}{81};$

$cos(2u)=cos^2(u)-sin^2(u)=\frac{80}{81}-\frac{1}{81}=\frac{79}{81};$

$tan(2u)=\frac{sin(2u)}{cos(2u)}=\frac{\frac{8\sqrt{5}}{81}}{\frac{79}{81} }=\frac{8\sqrt{5}}{79}.$

8 0

2 years ago

Please answer number 5 I’ll give brainliest thanks

kobusy [5.1K]

Answer:

Hello! answer: C

Hope that helps!

8 0

2 years ago

Read 2 more answers

Please help with an explanation!! will mark brainliest, not the best at fractions haha

Vitek1552 [10]

The correct answer is letter C; -6,
-5 2/5 or -27/5 and -4 1/5 or -21/5.

You can find this answers by substituting 1, 4, and 10 into the letter n.

Then you follow the operational order to get the answer.

8 0

3 years ago

Roberto wants to raise money for new equipment by selling T-shirts. He pays $5.00 for each T-shirt and needs to raise $450. If 7

zvonat [6]

Answer: Mark up percent = 20%

Step-by-step explanation:

Given: Cost price of each T-shirt = $5.00

Amount required = $450

Total students = 75

Market price for each T-shirt to raise the required amount = (Amount required ) ÷ 75

= $450 ÷ 75

= $ 6

Mark up percent = $\dfrac{\text{Market price - Cost price}}{\text{Cost price}}\times100$

$=\dfrac{6-5}{5}\times100\\\\=20\%$

Hence, Mark up percent = 20%

6 0

2 years ago

A radioactive substance decays exponentially: The mass at time t is m(t) = m(0)e^kt, where m(0) is the initial mass and k is a n

forsale [732]

Answer:

mean life = 8264.5 s

Step-by-step explanation:

k = - 0.000121

The relation is given by

$m = mo e^{kt}$

Now, the mean life is the life time for which the sample retains.

The mean life is the reciprocal of the decay constant.

The relation between the mean life and the decay constant is

$\tau =\frac{1}{k}\\\\\tau = \frac{1}{0.000121} = 8264.5 seconds$

5 0

3 years ago