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3 years ago

I'm using system of equations and I have to use either substitution or elimination. My two equations are

Mathematics

2 answers:

Pie3 years ago

5 0

You can multiply the equation of 2x by 4 so you can cancel out 8x

Art [367]3 years ago

4 0

Here’s the explanation and answer with both of the methods :)

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Estimated payments are often used by individuals who are self-employed, have investments, or other income where employer withhol

nexus9112 [7]

The correct answer of the given statement above would be TRUE. It is true that estimated <span>payments are often used by individuals who are self-employed, have investments, or other income where employer withholding is not offered. Hope this is the answer that you are looking for.</span>

8 0

3 years ago

In the equation y = 2/3 x - 5, name the slope (m), and the y-intercept (b).

balu736 [363]

Answer:

The slope is 2/3 and the y intercept is -5

Step-by-step explanation:

y = 2/3x -5

This is in the form y= mx +b where m is the slope and b is the y intercept

m =2/3 and b =-5

The slope is 2/3 and the y intercept is -5

6 0

3 years ago

The roots of a quadratic equation ax2+bx+c=0 are 3+sqrt2 and 3−sqrt2. Find the values of b and c assuming that a=1.

slamgirl [31]

Answer:

$b=-6\\c=7$

Step-by-step explanation:

we know that

The general equation of a quadratic function in factored form is equal to

$y=a(x-x_1)(x-x_2)$

where

a is a coefficient of the leading term

x_1 and x_2 are the roots

we have

$a=1\\x_1=3+\sqrt{2}\\x_2=3-\sqrt{2}$

substitute

$y=(1)(x-(3+\sqrt{2}))(x-(3-\sqrt{2}))$

Applying the distributive property convert to expanded form

$y=x^2-x(3-\sqrt{2})-x(3+\sqrt{2})+(3+\sqrt{2})(3-\sqrt{2})$

$y=x^2-(3x-x\sqrt{2})-(3x+x\sqrt{2})+(9-2)$

$y=x^2-3x+x\sqrt{2}-3x-x\sqrt{2}+7$

$y=x^2-6x+7$

therefore

$b=-6\\c=7$

7 0

3 years ago

In 1906 Kennelly developed a simple formula for predicting an upper limit on the fastest time that humans could ever run distanc

umka21 [38]

Answer / Step-by-step explanation:

(1) Given t = 0.0588s ¹.¹²⁵

where s is the distance and t is the time to run that distance.

The second portion asks us to find the derivative of the equation when our s value is equal to 20 and interpret.

(2) First, we try to convert the unit from miles to meters

Therefore, 1 mile = 1609 meters

Then,

t = 0.0588 ( 1609 ) ¹.¹²⁵

=238 . 09

This gives us the instantaneous rate of change of seconds between every 20 meters ran.

The last portion asks us to compare this estimate to current world records. And have they been surpassed?

As of today, the fastest official record for a standard mile is held by a man from Morocco named Hichan El Guerrouj. The time was recorded at 3.43 minutes in Rome, Italy on July 7th, 1999.

Now, keep in mind that this is almost a full minute slower than the estimated time. However, how do these projections hold up against Usain Bolt, the man that is considered the fastest man in the world ?

Although, Usain Bolt does run long distances, he holds records in nearly every sprinting event that he has ever competed in.

Hence, Kennelly's estimate for the fastest mile is 238.09

(3) Now, noting that since dt / ds = 0.0588 ( 1.25 ) s ⁰.¹²⁵

Then,

dt / ds I 100 = 0.0588 (1.25) (20) ⁰.¹²⁵

= 0.1176

6 0

3 years ago

How can I find an equivalent fraction for 84/100

Nostrana [21]

Answer:

Divide both the numerator and denominator by the GCD

Step-by-step explanation:

8 0

2 years ago

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