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2 years ago

Given that 8x−4y=39 Find y when x=5 Give your answer as a fraction in its simplest form

Mathematics

2 answers:

elena55 [62]2 years ago

7 0

Answer:

answer is 1/4 or One divided by four

strojnjashka [21]2 years ago

7 0

Answer:

$y=\frac{1}{4}$

Step-by-step explanation:

$8x-4y=39; x=5\\\\8(5)-4y=39\\\\40-4y=39\\\\40-40-4y=39-40\\\\-4y=-1\\\\\frac{-4y=-1}{-4}\\\\\boxed{y=\frac{1}{4}}$

Hope this helps.

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What is the radius of a semi circle when the area is 20cm

vazorg [7]

hello :
the area of the circle is : 40 cm²
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6 0

2 years ago

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tatyana61 [14]

Answer:

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3 years ago

Which ordered pairs are solutions to the inequality 3x-4y>5

Sloan [31]

Note: you did not provide the answer options, so I am, in general, solving this query to solve your concept, which anyways would clear your concept.

Answer:

Please check the explanation.

Step-by-step explanation:

Given the inequality

$3x-4y>5$

All we need is to find any random value of 'x' and then solve the inequality.

For example, putting x=3

$3\left(3\right)-4y>5$

$9-4y>5$

$-4y>-4$

$\mathrm{Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)}$

$\left(-4y\right)\left(-1\right)$

$4y$

$\mathrm{Divide\:both\:sides\:by\:}4$

$\frac{4y}{4}$

$y$

So, at x = 3, the calculation shows that the value of y must be less

than 1 i.e. y<1 in order to be the solution.

Let us take the random y value that is less than 1.

As y=0.9 < 1

so putting y=0.9 in the inequality

$3\left(3\right)-4\left(0.9\right)$

$=9-3.6$

$=5.4$

As 5.4 > 5

Means at x=3, and y=0.9, the inequality is satisfied.

Thus, (3, 0.9) is one of the many ordered pairs solutions to the inequality 3x-4y>5.

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2 years ago

Determine A:B:C, if A:B= 2:3 and B:C =4: 5

cestrela7 [59]

I’m confused what we are suppose to do

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2 years ago

Round 4.432 to the nearest tenth.

Slav-nsk [51]

Answer:

4.4

Step-by-step explanation:

The tenth place in this number is 4.432, so that should be the last digit.

Now, we need to know wether to round up or down. That is determined by the digit that comes after it. If that digit, here it is the hundredth, is 0-4, it rounds down, if it is 5-9, it rounds up. Our next digit is 3, which goes into the first category, so the number rounds down, so the tenth remains the same. That leaves us with 4.4.

5 0

2 years ago

Read 2 more answers