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3 years ago

If the sum of two expressions is 3x+5 and one expression is 5x-7 what is the other expression

Mathematics

1 answer:

ratelena [41]3 years ago

8 0

Answer:

-2x + 12

Step-by-step explanation:

If we call our other expression y, we can set up an equation tying together 3x + 5, y, and 5x - 7:

$(5x-7)+y=3x+5$

Solving for y by subtracting 5x - 7 from both sides will get us the expression we're looking for:

$y=3x+5-(5x-7)\\y=3x+5-5x+7\\y=-2x+12$

So the other expression in the sum is -2x + 12.

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Lisa [10]

Answer:

B. 200 doses

Step-by-step explanation:

Given,

1 dose is required for 100 mg,

Since, 1 mg = 0.001 g,

⇒ 100 mg = 0.1 g

⇒ 1 dost is required for 0.1 g,

Thus, the ratio of doses and quantity ( in gram ) is $\frac{1}{0.1}=10$

Let x be the doses required for 20 grams,

So, the ratio of doses and quantity is $\frac{x}{20}$

$\implies \frac{x}{20}=10$

$\implies x=200$

Hence, 200 doses can be obtained from 20 grams of the drug.

Option 'B' is correct.

8 0

2 years ago

An equation for the opposite of -12

Crank

Answer: (positive) 12

Step-by-step explanation:

7 0

3 years ago

3/4(ad).. solve.. a=12 d=9

kipiarov [429]

Answer:

hope it helps you see the attachment for further information

5 0

3 years ago

Read 2 more answers

5. What is an equation for the line with slope and y-intercept 9? (1 point)

Semenov [28]

6.) y - (-3) = (1 - (-3))/(3 - 1) (x - 1)
y + 3 = (1 + 3)/2 (x - 1)
y + 3 = 4/2 (x - 1)
y + 3 = 2(x - 1) = 2x - 2
y = 2x - 2 - 3 = 2x - 5
y = 2x - 5

4 0

3 years ago

Brainliest goes to whoever answers the question correctly

Fudgin [204]

Answer:

The answer is option A.

Step-by-step explanation:

A. y = 8/7x +5

8 0

3 years ago