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Vika [28.1K]
3 years ago
13

Find Find the value of y when x=-5, y=15x+1, When x=-5 , y=...

Mathematics
1 answer:
My name is Ann [436]3 years ago
8 0
Y = 15(-5) + 1
y = -75 + 1
y = -74
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A team of three students are working on a language-learning app; they need to develop 300 micro-lessons and 300 micro-tests befo
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Answer: a) 15 b)

Step-by-step explanation:

Let X be the number of days:

a)

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Jordan does 10 / day ( 10*X)

Marco 5 / day ( 5*X)

Junyi 5 / day ( 5*X)

For TESTS:

Jordan does 5 / day ( 5*X)

Marco 10 / day ( 10*X)

Junyi 8 / day ( 8*X)

for each they need a total of 300

a) 10X+5X+5X=300 => 20X = 300 => X = 15 days for the lessons

b) 5X+10X+8X = 300 => 23X = 300 => X = 13.04 days for the tests

so they need 15 days to finish both tasks

now if Junyi gets sick we just eliminate his contribution

a) 10X+5X=300 => 15X = 300 => X = 20 days for the lessons

b) 5X+10X = 300 => 15X = 300 => X = 20 days for the tests

so in 20 days they will finish without him

If jordan works 10 hours a day, we just replace him with 10/24

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b) 5(10/24)+10X+8X = 300 => X = 16.51 days for the tests

so at the end to complete both tasks they need 29.58 days

4 0
3 years ago
4 ounces for every 16 ounces. Rate or ratio and in simplest form
Bess [88]

4 for 16 would be written as 4/16.

Dividing both numbers by 4 it is simplified to 1/4

8 0
2 years ago
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2√72÷√8±√2<br><br> I Need help with this question fast
Oxana [17]

2√72 / √8 ± √2

If the denominator is √8 + √2,

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3 years ago
Wilson began watering his garden with a watering can that was completely full. The amount of water in the can as Wilson was wate
givi [52]

Answer:

Option B is correct, i.e. The amount of water originally in Wilson's can was 2.5 gallons.

Step-by-step explanation:

Given is the graph of Amount of water (in gallons) v/s Time (in seconds).

It is a linear graph whose general equation is given as follows:-

y=mx+b.

Where y = Amount of water, x = Time, m = slope, b = y-intercept (when time is zero).

Finding slope of line, m = (2.3 - 2.5)/(1 - 0) = -0.2 gallons per second.

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Hence, option B is correct, i.e. The amount of water originally in Wilson's can was 2.5 gallons.

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3 years ago
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What are the coordinates of A'and B'when AB is reflected in the y-axis? Show your work or explain
vaieri [72.5K]

The coordinates of A'and B'when AB is reflected in the y-axis are; (-2,5) and (-6,3).

<h3>What are the coordinates of A'and B'when AB is reflected in the y-axis?</h3>

According to the task content, it follows that the reflected points A' and B's coordinates are required.

From the graph, the coordinates of A= (2,5) and B= (6,3).

On this note, the coordinates of A' and B' upon reflection over the y-axis is; (-2,5) and (-6,3) respectively.

Read more on line reflection;

brainly.com/question/14062035

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1 year ago
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