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cupoosta [38]
3 years ago
14

4x=3y+23 4y+3x=-19 solve by substitution. No files pls

Mathematics
1 answer:
LuckyWell [14K]3 years ago
3 0

Answer:

x = ⁷/₅

y = ⁻²⁹/₅

Step-by-step explanation:

4x = 3y + 23 (×3)

12x = 9y + 69

4y + 3x = -19

3x = -4y - 19 (×4)

12x = -16y - 76

∴ 9y + 69 = -16y - 76

25y = -145

y = ⁻²⁹/₅

12x = 9(⁻²⁹/₅) + 69

12x = 69 - ²⁶¹/₅

12x = ⁸⁴/₅

x = ⁷/₅

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For part A the choices are 25 and 34 and for part b it is 2 and 10
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Answer:

Part A is 34

Part B is 2

Step-by-step explanation:

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To find the area cover increase by the algae per day, the exponent should be divided by 7 since there are 7 days in a week. Hence, every day, the area covered by the algae multiplies by 2^(1/7). In other words, 1 day after the algae was spotted, the area is 12.5 * 2^(1/7), which answers part B.

10 days after the algae was spotted, the area covered by the algae is 12.5 * 2^[(1/7)*10] = 33.6475... , which rounds up to 34 and answers part A.

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3 years ago
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Rewrite these in increasing order of length:<br> 133 dm. 433 cm, 308 km, 91 mm
Oksi-84 [34.3K]

\boxed{91mm

<h2>Explanation:</h2>

First of all, let's transform each measurement into meter knowing the following relationships:

1dm=0.1m \\ \\ 1cm=0.01m \\ \\ 1km=1000 m \\ \\ 1mm=0.001m

Therefore, we can compute the following:

\bullet \ 133dm \rightarrow 133dm(\frac{0.1m}{1dm})=13.3m \\ \\ \bullet \ 433cm \rightarrow 433cm(\frac{0.01m}{1cm})=4.33m \\ \\ \bullet \ 308km \rightarrow 308km(\frac{1000m}{1km})=308,000m \\ \\ \bullet \ 91mm \rightarrow 91mm(\frac{0.001m}{1mm})=0.091m

Writing this in increasing order:

0.091m

<h2>Learn more:</h2>

jovian planets in order of increasing distance from the Sun: brainly.com/question/12534549

#LearnWithBrainly

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3 years ago
Nancy earned $63 for 7 hours of babysitting. How much would Nancy earn for 55 hours of babysitting?
vovikov84 [41]

Answer:

$495

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Money earned for babysitting for 7 hours - $63

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2 years ago
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