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Iteru [2.4K]
3 years ago
10

Pls help its due in half an hour

Mathematics
2 answers:
umka2103 [35]3 years ago
6 0

Answer:

Common denominator 20

\frac{3}{ \: 4 \:} \: and \:  \frac{2}{5}

because 4 and 5 can both go into 20 without any remainder

Common denominator 18

\frac{3}{6} and \:  \frac{2}{9}

because 6 and 9 can both go into 18 without any remainder

Common denominator 8

\frac{1}{2}  \: and \:  \frac{7}{8}

because 2 and 8 can both go into 8 without any remainder

Hope this was helpful!

xxMikexx [17]3 years ago
3 0
Oh wow mine is due in half an hour too
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Can anyone help don’t understand
makvit [3.9K]

Answer:

Twenty decreased by a number. The question says that "a number" =X.

twenty = 20

decreased = minus

by a number = X

Put this all in a line and you get...

an answer of:

20 - X.

3 0
2 years ago
Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.
Vinvika [58]

Answer:

The point estimate for population mean is 8.129 Mpa.

Step-by-step explanation:

We are given the following in the question:

Data on flexural strength(MPa) for concrete beams of a certain type:

11.8, 7.7, 6.5, 6.8, 9.7, 6.8, 7.3, 7.9, 9.7, 8.7, 8.1, 8.5, 6.3, 7.0, 7.3, 7.4, 5.3, 9.0, 8.1, 11.3, 6.3, 7.2, 7.7, 7.8, 11.6, 10.7, 7.0

a) Point estimate of the mean value of strength for the conceptual population of all beams manufactured

We use the sample mean, \bar{x} as the point estimate for population mean.

Formula:

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

\bar{x} = \dfrac{\sum x_i}{n} = \dfrac{219.5}{27} = 8.129

Thus, the point estimate for population mean is 8.129 Mpa.

4 0
2 years ago
14. Subtract: 5 - 3 1/3.<br><br> A. 313<br> B.223<br> C. 12/3<br> D.23
exis [7]

Answer:

The answer is 1 \frac{2}{3}

The work is shown on the picture.

Step-by-step explanation: Hope this helps and mark brainliest if ya want :)!

6 0
3 years ago
Xavier rides his bike 5 1/4 miles or 82% of his goal for the day. What is his goal for the day?
Leno4ka [110]
Use ratio and proportion

5.25/x= 82/100
cross multiply
82 x= 525
     x= 6.4 miles

Hope this helps
8 0
2 years ago
Given two different circles O and Q, which of the following cases presents two circles with no (zero) common tangents?
borishaifa [10]
Concentric circles because if a line is tangent to one circle, it would only intersect teh other 
3 0
3 years ago
Read 2 more answers
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