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3 years ago

6. 2x+(-4)y (if x = -4 and y=-2) Evaluate each expression using the variable replacement

Mathematics

2 answers:

aleksandr82 [10.1K]3 years ago

8 0

Answer:

-4

Step-by-step explanation:

( 2 * - 2 ) + ( -4 * - 2 )

= -4 + 8

= -4

ASHA 777 [7]3 years ago

3 0

Answer:

-4

Step-by-step explanation:

(2)(-2)+(-4)(-2)

=(-4) + 8

= (-4)

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Tatiana [17]

Answer:

X = 13

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Step-by-step explanation:

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3 years ago

The largest county in the state of Texas is 6064 square miles larger than the smallest county in the same state. The size of the

Ann [662]

The smallest county is 129 square miles large.

Step-by-step explanation:

Let,

Smallest county = x

Largest county = y

According to given statement;

The largest county in the state of Texas is 6064 square miles larger than the smallest county in the same state.

y = x+6064 Eqn 1

The size of the largest county is 48 times the size of the smallest county plus one square mile.

y = 48x+1 Eqn 2

As Eqn 1 and Eqn 2 are both equal to y, therefore,

Eqn 1 = Eqn 2

$x+6064=48x+1\\6064-1=48x-x\\6063=47x\\47x=6063$

Dividing both sides by 47

$\frac{47x}{47}=\frac{6063}{47}\\x=129\ square \ miles$

The smallest county is 129 square miles large.

Keywords: linear equation, substitution method

Learn more about substitution method at:

#LearnwithBrainly

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3 years ago

3-14 plzzz except #13 20 points!

Marianna [84]

#3: 15

#4: 13.2

#5: 5.44 (curious as to how you guessed 7)

#6: 7

#7: 7.3

#8: 15

#9: You'd round 0.9 to 1 and 3.78 to 4. 4/1 = 4

#10: Round 2.5 to 3. 36/3 = 12

#11: If they want you to round 0.25 down to 0, then 7/0 is undefined.

#12: 9.5 rounds to 10 142.5 rounds to 143. 143/10 = 14.3

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3 years ago

Will mark Brainlest Help please

madreJ [45]

Answer:

the duplicate ratio of a : b

= a²/b²

Step-by-step explanation:

for example:-

for understanding

if u wanna find the duplicate ratio of 4:5

so,

4²/5²= 16/25

•°• 16:25

16:25 is your duplicate ratio of 4:5

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3 years ago

Dan has a favorite number his number has the digit 8 in the ones place and the digit 5 in the tens place. what is Dan favorite n

Licemer1 [7]

The answer would be 85...;)

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3 years ago

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