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2 years ago

X-5y=2 and 4x+2y=8 using elimination

Mathematics

2 answers:

sergejj [24]2 years ago

7 0

Answer:

x=2+5y

and

x=2-y/2

Step-by-step explanation:

kobusy [5.1K]2 years ago

6 0

Answer:

y=0 x=2

Step-by-step explanation:

You might be interested in

How many integers between 360 and 630 are there such that they have odd number of divisors?

Kryger [21]

Answer:

Step-by-step explanation:

Concept to Know: "A number is a perfect square if and only if it has odd number of positive divisors "

Find all the squared values that lies between 360 and 630

360< 19², 20², 21², 22², 23², 24², 25² < 630

19², 20², 21², 22², 23², 24², and 25² are all the squared values that lies between 360 and 630. There are seven of those squared numbers so the answer is 7.

6 0

2 years ago

The diameter of a circle is 36 centimeters. Find the radius

olga2289 [7]

Answer:

Given

in a circle

Diameter ( d) = 36 cm

Then we have the formula that

Radius (r) = d / 2

= 36 / 2 = 18 cm

6 0

2 years ago

Solve sin^2θ−4sinθ−5=0 for 0°≤θ≤360°

Alinara [238K]

Answer:

$\theta=270^\circ$

Step-by-step explanation:

<u>Given Equation and Parameters</u>

$sin^2\theta-4sin\theta-5=0,\: 0^\circ\leq\theta\leq 360^\circ$

<u />

<u>Calculation</u>

Let $u=sin\theta$ , thus:

$u^2-4u-5=0\\\\(u+1)(u-5)=0\\\\u=-1,\: u=5$

$sin\theta=-1\\\\\theta=270^\circ$

$sin\theta=5\\\\\theta=unde fined$

<u>Conclusion</u>

$\theta=270^\circ$

3 0

2 years ago

Use IF functions to calculate the regular pay and overtime pay based on a regular 40-hour workweek in cells E5 and F5. Pay overt

g100num [7]

Excel formulas are expressions used to perform computation.

The Excel formula to enter in cell E5 is =IF(D5<$B$21,D5,$B$21) * C5
The Excel formula to enter in cell E5 is =IF(D5>$B$21,(D5-$B$21) * C5 * $B$22, 0)

<h3 /><h3>The regular pay</h3>

From the complete question, cell B21 represents base work hour

So, we start by checking if the work hour in cell D5 is less than the base work hour in cell B21

If yes, the work hour remains D5; otherwise the work hour is cell B21

The work hour is then multiplied by the rate in cell C5

Hence, the Excel formula to enter in cell E5 is =IF(D5<$B$21,D5,$B$21) *

<h3>The overtime pay</h3>

Here, we start by checking if the work hour in cell D5 is greater than the base work hour in cell B21

If yes, the overtime hour the difference between D5 and B21; otherwise the overtime hour and pay is 0

The over time hour if there is, is then multiplied by the rates in cells C5 and B22

Hence, the Excel formula to enter in cell E5 is =IF(D5>$B$21,(D5-$B$21) * C5 * $B$22, 0)