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3 years ago

Solve 7x - 2y = -3

1 answer:

7 0

1. x= -1/7 y=24/7 (use socratic app, because this is too much work)
2. y = 2
3. y = 1/3 (use socratic app, because this is too much work)
4. x=2, y= -1

2) x-3y= -6
2x-7y=10

x-3y=-6
+3y +3y

2(-6+3y)-7y=10
-12+6y-7y=10
-12-y=10
+12 +12
-y= -22
y= -22

4) 5x-3y= -11
2x-6y= -14

3x+5y=3
x-2y=0
+2y +2y
x=2y (not the answer yet)

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

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Your child needs a fever medication at 3:00 in the morning. The package says to give two

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they must have 1.33 teaspoons of medication for child weighing 40 pounds !

<u>Step-by-step explanation:</u>

Here we have , Your child needs a fever medication at 3:00 in the morning. The package says to give two teaspoons to a sixty-pound child. If your child weighs forty pounds, We need to find how much should they have. Let's find out :

For medication purpose , 60 pounds require 2 teaspoons . So , 1 pounds require :

⇒ $\frac{2}{60}$

⇒ $\frac{1}{30}$

So , for 40 pounds we require number of teaspoons as :

⇒ $\frac{1}{30}(40)$

⇒ $\frac{4}{3}$

⇒ $1.33$

Therefore , they must have 1.33 teaspoons of medication for child weighing 40 pounds !

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4 years ago

a rectangular ponds refectuons in a part is 16 feet long. The maintenance crew placed a string of flags 20 feet long across the

frosja888 [35]

Answer:

width = 12 ft

Step-by-step explanation:

Given the figure of the pond and the fact that the corners form a right triangle that is across from the string of flags, you can use the Pythagorean Theorem to solve for the width of the triangle that is formed by the flags:

a² + b² = c², where 'a' and 'b' represent the legs of the triangle and 'c' represents the diagonal or hypotenuse. Using 16 for 'a' and 20 for 'c':

16² + b² = 20²

256 + b² = 400

Subtract 256 from both sides: 256 - 256 + b² = 400 - 256 or b² = 144

Take the square root of both sides: √b² = √144 or b = 12 ft

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4 years ago