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yan [13]
3 years ago
15

6th out 10 questions

Mathematics
2 answers:
kicyunya [14]3 years ago
6 0

The ratio would be C=16/20

konstantin123 [22]3 years ago
4 0

Equivalent ratios are created by multiplying both numbers in the ratio by the same value. In the first ratio, 15 = 5 x 3, but 10 ≠ 4 x 3, so it's not equivalent to 4:5. In 4/10, 4 = 4 x 1, but 10 = 5 x 2, so again, the two aren't equivalent.

In 16/20, though, we find that 16 = 4 x 4 and 20 = 5 x 4. Since both the 4 and the 5 are being scaled up by the same factor, 16/20 is equivalent to 4:5.

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Automobiles traveling on a road with a posted speed limit of 65 miles per hour are checked for speed by a state police radar sys
Wittaler [7]

Answer:

The mean speed of the automobiles traveling on this road is the closest to 65 mph.

Step-by-step explanation:

frequency distribution of speeds.

Speed (mph) | Frequency

45 up to 55 | 70

55 up to 65 | 360

65 up to 75 | 250

75 up to 85 | 110

Using the midpoint method, we represent each group/class of speeds with the midpoint speed, then go ahead to compute the mean.

Let the speed be x

The frequency be f

x | f

50 | 70

60 | 360

70 | 250

80 | 110

Mean = (Σfx)/(Σf)

Σfx = (50×70) + (60×360) + (70×250) + (80×110) = 51,400

Σf = 70 + 360 + 250 + 110 = 790

Mean = (Σfx)/(Σf)

Mean = (51400/790) = 65.06 mph ≈ 65 mph

The mean speed of the automobiles traveling on this road is the closest to 65 mph

Hope this Helps!!!

7 0
3 years ago
A dance group from Round Rock High School is fundraising to travel to a competition. The competition entry fee is only $300 for
Anika [276]

Answer:

$30.00 i think?

Step-by-step explanation:

$100 x 30 = $30.00

5 0
2 years ago
What is the formula for the confidence interval? Then, define what each variable represents.
Alisiya [41]
The confidence interval for a <span>(1−α)%</span> confidence level is given by
<span>
(<span>θ0</span>−<span>Z<span>α/2 </span></span><span>σ/√n</span>, <span>θ0</span>+<span>Z<span>α/2 </span></span><span>σ/√n</span>)

</span><span>θ0</span> is the measured statistic, <span>Z<span>α/2</span></span> is the cutoff/critical value, and <span>σ/<span>√n</span></span> is the standard error. σ is the population standard deviation (if known) or can be estimated by a sample standard deviation. n is the sample size. The cutoff value depends on the test you wish to use, and <span>θ0</span><span> depends on the statistic you wish to estimate.</span>
7 0
3 years ago
The diagram shows a prism.
telo118 [61]

Answer:

Total surface area of the prism = 920 cm²

Step-by-step explanation:

Given prism has 2 similar triangular surfaces and 3 rectangular surfaces of different dimensions.

Area of one triangular side = \frac{1}{2}(\text{Base})(\text{Height})

Area of 2 similar sides = Base × Height

                                     = 8 × 15

                                     = 120 cm²

Area of rectangular side with dimensions 17cm × 20cm

Area of the side = 17 × 20 = 340 cm²

Area of the second rectangular side with dimensions 8cm × 20cm

Area of the side = 8 × 20 = 160 cm²

Area of third rectangular side with dimensions 20cm × 15cm

Area of the side = 20 × 15 = 300 cm²

Total surface area of the given triangular prism = 120 + 340 + 160 + 300

                                                                               = 920 cm²

6 0
3 years ago
Find the value of x to the nearest tenth
Hitman42 [59]

Answer:

a^2+b^2=c^2

6^2+6^2=72

square root of 72

=8.49(3sf)

c^2-b^2=a^2

=3

x=3

5 0
3 years ago
Read 2 more answers
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