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3 years ago

Which variable would it be easiest to solve for

Mathematics

2 answers:

Masja [62]3 years ago

5 0

Answer: the easiest to solve for is y in the second equation.

Explanation: To solve for the y in the second equation, only one step is needed, namely subtracting 3x from both sides:

3x + y = 9

y = 9 - 3x

This is unlike the rest of the options, which require at least two operations.

tankabanditka [31]3 years ago

3 0

Answer is :Y is the easiest first using second equation . Ill show you steps below why . If you want to see the steps .

2x+4y=26

3x+y = 9

So first solve second equation

3x+y=9

Y= -3x+9

Now plug into first equation

2x+4y=26

2x+4(-3x+9)=26

2x-12x+36=26

-10x+36=26

-10x= 26-36

-10x= -10

X=1

So now solve for y in second equation

Y= -3x+9

Y= -3(1)+9

Y= -3+9

Y= 6

So if you were to be asked answer in point (1,6).

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If the probability of rain ia 0.87, what is the probability of NO rain? HELP

Alex777 [14]

An event will definitely either happen or not happen.

The total probability of it (happening or not happening) is 100%.

So if the probability of it happening is 87%, then the probability of it
NOT happening is
(100% - 87%) = 13% .

7 0

3 years ago

Which values of a and b make the following equation true? (5x7y2)(-4x4y5)=-20xayb

Kaylis [27]

Answer:

The values of a and b are a = 11 , b = 7

Step-by-step explanation:

* Lets explain how to solve the problem

* In the exponential functions we have some rules

1- In multiplication if they have same base we add the power

# Ex: b^m × b^n = b^(m + n) ⇒ b is the base , m and n are the powers

2- In division if they have same base we subtract the power

# Ex: b^m ÷ b^n = b^(m – n) ⇒ b is the base , m and n are the powers

3- If we have power over power we multiply them

# Ex: (b^m)^n = b^(mn) ⇒ b is the base , m and n are the powers

* Lets solve the problem

∵ The equation is $(5x^{7}y^{2})(-4x^{4}y^{5})=-20x^{a}y^{2}$ ⇒ (1)

- At first multiply the coefficients

∵ -4 × 5 = -20

- Multiply the base x

∵ $(x^{7})(x^{4})=x^{7+4}=x^{11}$

- Multiply the base y

∵ $(y^{2})(y^{5})=y^{2+5}=y^{7}$

∴ $(5x^{7}y^{2})(-4x^{4}y^{5})=-20x^{11}y^{7}$ ⇒ (2)

- By comparing (1) and (2)

∴ a = 11 and b = 7

* The values of a and b are a = 11 , b = 7

5 0

3 years ago

Read 2 more answers

(1 point) let a=⟨−4,−3,2⟩a=⟨−4,−3,2⟩. find a unit vector in the same direction as aa.

sergij07 [2.7K]

A unit vector in the direction of a would be the vector a multiplied by a factor such that the length of vector a is unity.
The magnitude of a is given by:
|a|
=sqrt(4^2+3^2+2^2) [ I got lazy instead of writing (-4)^2+(-3)^2+2^2]
=sqrt(29).

So the univector is a/sqrt(29), or (-4/sqrt(29),-3/sqrt(29), 2/sqrt(29), or simply (-4,-3,2)/sqrt(29).

8 0

3 years ago

The question is in the picture btw

Naddik [55]

Answer:

The width of the andre is 5×5×5=15

Then surface area will be length ×width=15×10=50

4 0

2 years ago

On August 20, 1989, in Cologne, West Germany, Said Aouita of Morocco also established a world record when he ran the 3000. m run

zalisa [80]

Answer:

Average speed of Aouita = 6.68 meter per second.

Step-by-step explanation:

To create a world record Aouita ran a distance = 3000 m

He took the time to cover this distance = 7 minutes 29.45 seconds

= (7×60) + 29.45 seconds

= 449.45 seconds

Since, formula for the average speed is given by,

Average speed = $\frac{\text{Total distance covered}}{\text{Total time taken}}$

Therefor, average speed of Aouita = $\frac{3000}{449.45}$

= 6.675

≈ 6.68 meter per second

Average speed of Aouita was 6.68 meter per second.

8 0

3 years ago