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3 years ago

What is the solution of 3x + 5 = 2x – 7

Mathematics

1 answer:

Y_Kistochka [10]3 years ago

3 0

Answer:

x=-12

Step-by-step explanation:

3x+5=2x-7

3x=2x-12

x=-12

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he table shows the number of calories in different numbers of apples. Number of Apples 3 5 8 Number of Calories 195 325 520 How

lutik1710 [3]

Answer:

The correct answer is 585 colories. I know it is correct because I tooked the quiz.

Hope it helps! :)

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3 years ago

Write the number 0.5 in the form mc003-1.jpg, using integers, to show that it is a rational number.

Tasya [4]

If $x=0.5$ , then $10x=5$ , and so $x=\dfrac5{10}=\dfrac5{5\times2}=\dfrac12$ .

6 0

3 years ago

Chance bought a surf board for 249. Now it's on sale for 221.10. Find the percent of the discount

Masteriza [31]

<u>Answer: </u>

Chance bought a surf board for 249. Now it's on sale for 221.10 and 11.20% is the discount.

<u>Solution: </u>

Step 1:

Bought price= RS.249

Sale price=RS.221.10

Step 2:

Discount = bought price - sales price

Discount = 249 - 221.10

Discount = 27.9

Step 3:

Discount Percent = $\frac{\text {Discount}}{M R P} \times 100$

Substitute the value for Discount which we found in step 2 in the above formulae

Discount Percent = $\frac{27.9}{249} \times 100$

On simplification, we get

$\frac{27.9}{249} \times 100$

Discount Percent = 11.20%

Result:

Hence from the given data, we got the discount percent is 11.20%

5 0

3 years ago

A hypothetical square grows so that the length of it's diagonals are increasing at a rate of 8 m/min. How fast is the area of th

guapka [62]

Answer:

32 $m^{2}/min$

Step-by-step explanation:

We let the length of the square be l, the diagonal be z and the area be A.

Then by Pythagoras theorem;

$l^{2}+l^{2}=z^{2}\\2l^{2}=z^{2}$

The are of a square of length l is given as;

$A=l^{2}$

Combining these two equations yields;

$z^{2}=2A$

$A=\frac{z^{2} }{2}$

Next, we have been given;

$\frac{dz}{dt}=8$

We are required to find;

$\frac{dA}{dt}$ when z = 4

By chain rule;

$\frac{dA}{dt}=\frac{dA}{dz}*\frac{dz}{dt}$

Differentiating $A=\frac{z^{2} }{2}$ with respect to z yields;

$\frac{dA}{dz}=z$

Therefore,

$\frac{dA}{dt}=\frac{dA}{dz}*\frac{dz}{dt}$ = 8z

When z is 4m the area of the square will be increasing at a rate of;

8m/min * 4m = 32 $m^{2}/min$

5 0

3 years ago

Denominator of the fraction

Law Incorporation [45]

Answer:

Denominator for 2/5 is 5, and denominator for 13/16 is 16.

7 0

3 years ago