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3 years ago

4x-6=x+9 i need help can someone show the work too please

Mathematics

2 answers:

lidiya [134]3 years ago

7 0

Answer:

x = 5

Step-by-step explanation:

instructions in pic :)

Semenov [28]3 years ago

7 0

4x - 6 = x + 9

4x - 6 - x - 9 = x + 9 - x - 9 [Subtract x + 9 from both sides]

3x - 15 = 0

3x - 15 + 15 = 0 + 15 [Add 15 to both sides]

3x = 15

3x/3 = 15/3 [Divide both sides by 3]

x = 5

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Fertiliser is sold in 100kg bags labelled with the amount of nitrogen (N), phosphoric acid (P2O5), and potash (K2O) present. The

anzhelika [568]

Answer:

We need 5 bags of Vigoro Ultra Turf and 4 bags of Parkers Premium fertilizer.

Step-by-step explanation:

Let's first list the percentage compositions of each fertilizer type:

<u>Vigoro Ultra Turf:</u>

Nitrogen (N) = 29 kg

Phosphoric Acid (P2O5) = 3 kg

Potash (K2O) = 4 kg

<u>Parkers Premium</u>

Nitrogen (N) = 18 kg

Phosphoric Acid (P2O5) = 25 kg

Potash (K2O) = 6 kg

We can set up simultaneous equations to find out the amount of 100 kg bags of each fertilizer needed:

x = Vigoro Ultra turf (one bag)

y = Parkers Premium (one bag)

29x + 18y = 217 -Equation 1

3x + 25y = 115 -Equation 2

4x + 6y = 44 -Equation 3

Solving for x and y, we get:

x = 5

y = 4

This means we need 5 bags of Vigoro Ultra Turf and 4 bags of Parkers Premium fertilizer.

6 0

4 years ago

Josie works in a sports store. She

zmey [24]

Answer:

Total sales for the day is $437.50.

Step-by-step explanation:

If $35 represents 8% of the sale, what amount represents 100% of sales.

35/8% = 437.50

5 0

3 years ago

Write an expression to represent “7 less than 6 times a number n.”

goldfiish [28.3K]

Answer:

7 < 6n

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

In preparing a certain ointment, a pharmacist used 28.35 g of zinc oxide instead of the 31.1 g called for. Calculate the percent

Vilka [71]

Answer: 9.70%

Step-by-step explanation:

The formula to find the percentage error is given by :-

$\%\text{ error}=\dfrac{|\text{Estimate-Actual}|}{\text{Actual}}\times100$

Given : Actual mass of zinc oxide used by pharmacist = 28.35 g

Estimated mass of zinc oxide used by pharmacist =31.1 g

Now, $\%\text{ error}=\dfrac{|31.1-28.35|}{28.35}\times100$

i.e. $\%\text{ error}=\dfrac{2.75}{28.35}\times100$

i.e. $\%\text{ error}=9.70017636684\approx9.70\%$

Hence, the percentage of error on the basis of the desired quantity.= 9.70%

5 0

4 years ago

The point (2, -3 ) is reflected in the line x = 0 find the image

Mnenie [13.5K]

Answer:

The image of $P(x,y) = (2,-3)$ is $P'(x,y) = (-2, -3)$ .

Step-by-step explanation:

According to this statement, we need to find the image of a given point by reflection with respect to the y-axis. The reflection can be done by following operation:

$P(x,y) = (x, y) \to P'(x,y) = (-x, y)$ (1)

Where:

$P(x,y)$ - Original point.

$P'(x,y)$ - Reflected point.

If we know that $x = 2$ and $y = -3$ , then the reflecting point is:

$P'(x,y) = (-2, -3)$

The image of $P(x,y) = (2,-3)$ is $P'(x,y) = (-2, -3)$ .

4 0

3 years ago