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Arlecino [84]
3 years ago
12

What is cross multiplication helpful is?

SAT
2 answers:
DiKsa [7]3 years ago
5 0
In mathematics, specifically in elementary arithmetic and elementary algebra, given an equation between two fractions or rational expressions, one can cross-multiply to simplify the equation or determine the value of a variable.
Mamont248 [21]3 years ago
4 0
Cross Multiplication is helpful for when you are using fractions.

Example:
1 4
— x — = ?????
2 2

Sooooo, you must multiply 1 by 2 to get 2. Then, multiply 4 by to 2, to equal 8.
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Factor the expression into an equivalent form 12y^2-75.
elena-14-01-66 [18.8K]

Hello oddworld7836!

\huge \boxed{\mathbb{QUESTION} \downarrow}

Factor the expression into an equivalent form 12y² - 75.

\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}

12 y ^ { 2 } - 75

By observing the expression, we can see that, 3 is the only common factor in both the terms of the expression. So, take the common factor 3 out.

12 y ^ { 2 } - 75 \\  = 3\left(4y^{2}-25\right)

Now, look at (4y² - 25). They don't have any common factors but they appear in the form of the algebraic identity ⇨ a² - b² = (a + b) (a - b). Here,

  • a² = 4, a = 2 (√a² = ✓4 = 2)
  • b² = 25, b = 5 (√b² = ✓25 = 5)

So, the (4y² + 25) becomes...

(4 {y}^{2}  - 25) \\  = \left(2y-5\right)\left(2y+5\right)

Now, bring the 3 (common factor) & rewrite the complete expression.

12 y ^ { 2 } - 75 \\  =  \boxed{ \boxed{ \bf \: 3\left(2y-5\right)\left(2y+5\right) }}

We can't further simplify it. Also, remember that the simplified form of an expression is equivalent to the expression. So, 3 (2y - 5) (2y + 5) is equivalent to 12y² - 75.

__________________

Hope it'll help you!

ℓu¢αzz ッ

8 0
2 years ago
Gina owns a home in Atlanta. Every year, she pays (5 points)
djyliett [7]

Answer:A. Personal property tax

Explanation:

6 0
2 years ago
Read 2 more answers
The ratio of the amount of vitamin A in cow milk to the amount of vitamin A in goat milk is
miv72 [106K]

Answer:

2080 IU

Explanation:

Given

Ratio of vitamin A in cow milk to goat milk = 3 : 4

Required

Determine the content of vitamin A in goat milk if cow milk has 1560 IU

The given parameters shows a direct proportion.

Let G represents Goat and C represent Cow

Given that there exists a direct proportion;

C = K * G where K represents the constant of proportionality.

Solving for K when C = 3 and G = 4

C = K * G becomes

3 = K * 4

3 = 4K

Divide through by 4

¾ = K

K = ¾

Now, solving for G given that C = 1560IU;

We'll make use of the same formula as above

C = K * G

Substitute 1560 for C and ¾ for K; the expression becomes

1560 = ¾ * G

Multiply both sides by 4

4 * 1560 = 4 * ¾ * G

6240 = 3 * G

Multiply both sides by ⅓

⅓ * 6240 = ⅓ * 3 * G

2080 = G

G = 2080

Hence, the vitamin A in the goat milk is 2080IU

5 0
3 years ago
If 3a+b/b=7/5<br> what is the value of a/b
neonofarm [45]

Answer:

a/b= 2/15

Explanation:

3a +b

----------- = 7/5

b

<h2>now cross multiple both side</h2>

5(3a+b)=7 x b

15a +5b = 7b

15a = 7b-5b

15a = 2b

15a/2b = 1

a/b x 15/2 =1

<h3>multiple both side by 2/15</h3>

we get,

a/b = 2/15

hope you have no doubt now !

<h2>we get ,</h2>

4 0
3 years ago
One goal of networking is to:
jasenka [17]

THE ANSWER IS C.!!! HOPE THIS HELPS!

IF YOU LIKE MY ANSWER PLS GIVE ME BRAINLIEST!

7 0
3 years ago
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