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3 years ago

Find the product: −4 7 (−13 2 )

Mathematics

2 answers:

LuckyWell [14K]3 years ago

8 0

Can you re write it, I cant read it

telo118 [61]3 years ago

5 0

Answer:

Find the product:

−4/7*(−13/2)

Step-by-step explanation:

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Can the sides of a triangle have lengths 1, 7, and 11? Explain

Airida [17]

Given 3 sides of a triangle, the sum of any 2 sides must be greater than the third side.

Consider the 3 given sides 1, 7 and 11

7 + 11 = 18 > 1

1 + 11 = 12 > 7

1 + 7 < 11 ⇒ not valid

Hence these sides do not form a triangle

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3 years ago

Each of the six letters stands for a different number, 1 through 9. Using the three clues, can you deduce the number represented

-BARSIC- [3]

Answer:

A = 9

B = 2

C = 5

D = 1

E = 8

F = 7

Step-by-step explanation:

A 9 B 2 C 5 = 16

D 1 E 8 F 7 = 16

10 10 12

BxC (2x5) = 10

A+D (9+1) = 10

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3 years ago

70% of the 30 sandcastles at Donatello Beach have moats. how many more moats are there

bixtya [17]

Answer:

21 moats

Step-by-step explanation:

.70 x 30 = 21

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3 years ago

Read 2 more answers

A random sample of 31 charge sales showed a sample standard deviation of $50. a 90% confidence interval estimate of the populati

Marysya12 [62]

The $100(1-\alpha)\%$ confidence interval of a standard deviation is given by:

$\sqrt{ \frac{(n-1)s^2}{\chi^2_{1- \frac{\alpha}{2} } }} \leq\sigma\leq\sqrt{ \frac{(n-1)s^2}{\chi^2_{\frac{\alpha}{2} } }}$

Given a sample size of 31 charge sales, the degree of freedom is 30 and for 90% confidence interval,

$\chi^2_{1- \frac{\alpha}{2} }=43.773 \\ \\ \chi^2_{\frac{\alpha}{2} }=18.493$

Therefore, the 90% confidence interval for the standard deviation is given by

$\sqrt{ \frac{(31-1)50^2}{43.773 }} \leq\sigma\leq\sqrt{ \frac{(31-1)50^2}{18.493 }} \\ \\ \Rightarrow\sqrt{ \frac{(30)2500}{43.773 }} \leq\sigma\leq\sqrt{ \frac{(30)2500}{18.493 }} \\ \\ \Rightarrow\sqrt{ \frac{75000}{43.773 }} \leq\sigma\leq\sqrt{ \frac{75000}{18.493 }} \\ \\ \Rightarrow \sqrt{1713.38} \leq\sigma\leq \sqrt{4055.59} \\ \\ \Rightarrow41.4\leq\sigma\leq63.7$

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3 years ago

I need this answer ASAP! Joanie's family traveled 3/ 10 of the distance to her grandmother’s house on Saturday. They traveled 4

VMariaS [17]

Answer:

61/70

Hello everyone my name is Nevaeh, I know everyone needs help in some way, shape, or form and i am willing to provide. I set up a google classroom where people can ask me questions and get help on work. No question is a stupid question so do not be afraid to ask. I usually only focus on core subjects but if you ask i will help with other specialized subjects. I can do essays all the way to power points :)

My google classroom is Brainly help the code is 7hr2k4

Step-by-step explanation:

i dont know and understand your questions so i added the 2 fractions together

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3 years ago