All categories

3 years ago

Elimination w/ multiplication

Mathematics

1 answer:

yan [13]3 years ago

4 0

Answer:

"Equations can be multiplied by a constant to allow for elimination by addition or subtraction. This process is called Elimination by Multiplication. We multiply the first equation by "2" to prepare it for elimination by subtraction. Now that we know "x", we can use this information to solve for "y"."

You might be interested in

Suppose you toss a 6-sided die 40 times, with 14 tosses landing on the five. What percentage of the tosses would be fives?

Alex777 [14]

$\dfrac{14}{40}\cdot100\%=35\%$

3 0

3 years ago

Read 2 more answers

Make cos C the subject of the formula<br> C?= a? + b? - 2ab cos C

lara31 [8.8K]

<h3>Answer: Choice E</h3>

Work Shown:

$c^2 = a^2 + b^2 - 2ab\cos(C)\\\\c^2 + 2ab\cos(C) = a^2 + b^2\\\\2ab\cos(C) = a^2 + b^2 - c^2\\\\\boldsymbol{\cos(C) = \frac{a^2 + b^2 - c^2}{2ab}}\\\\$

5 0

2 years ago

425 is what percent of 1700

IgorLugansk [536]

Find 425/1700 as a decimal fraction, and then mult. the result by 100%:

425
-------- * 100% = 25% (answer)
1700

4 0

4 years ago

Tell whether the ratios are equivalent: 3 days to 4 hours and 9 days to 12 hours. show your work.

bonufazy [111]

Answer:

yes.

Step-by-step explanation:

write these ratios as fractions to see if they are proportional

3/4

9/12 -------> this can be simplified by dividing by 3

= 3/4

therefore yes they are equivalent

5 0

3 years ago

Let k ( x ) = 2 x + 3 and m ( x ) = 3 x 2 + 7 x − 10 . Find the indicated value. M ( k ( − 4 ) ) =

murzikaleks [220]

Answer: $30$

Step-by-step explanation:

Given

$k(x)=2x+3$

$M(x)=3x^2+7x-10$

$M\left(k(x)\right)$ is given by replacing the $x$ by $k(x)$ from the $M(x)$

$\Rightarrow M\left(k(x)\right)=3(2x+3)^2+7(2x+3)-10\\\Rightarrow M\left(k(x)\right)=3(4x^2+9+12x)+14x+21-10\\\Rightarrow M\left(k(x)\right)=12x^2+50x+38$

Now, $M\left(k(-4)\right)$ is

$\Rightarrow M\left(k(-4)\right)=12(-4)^2+50(-4)+38\\\Rightarrow M\left(k(-4)\right)=192-200+38\\\Rightarrow M\left(k(-4)\right)=30$

8 0

3 years ago