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olya-2409 [2.1K]
3 years ago
6

Please help due tomorrow

Mathematics
1 answer:
Law Incorporation [45]3 years ago
4 0

You would convert the mixed numbers into improper fractions because then you have it in an easier place to solve. You can easily solve by multiplying the numerators and then the denominators. Multiplying mixed numbers have a few extra steps then multiply improper fractions.


(if this is wrong I'm sorry. I've answered to the best of my ability)

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Can somebody please check these? I'm struggling on this. If I'm wrong please correct me.
Minchanka [31]
They all look good except for 4 5 and 6 switch them
4 0
3 years ago
Gina is a certain age (g). Gina's older sister is twice Gina's age. Gina's brother is half Gina's age. The sum of their ages is
aliina [53]

Answer:

Gina is 12 years old

Step-by-step explanation:

First,  we will have to write these statements mathematically and then solve.

Let Gina's age be x, let Gina's brother's age be y and let Gina's sister's age be z.

The second statement"Gina's older sister is twice Gina's age" can be mathematically written as: z =2 x ---------------------------(1)

The next statement "Gina's brother is half Gina's age" can be mathematically written as y = \frac{x}{2} ---------------------------------------(2)

Then the next statement "the sum of their ages is 42" can be mathematically written as: x + y + z = 42 ----------------------------(3)

We can now proceed to solve;

Substitute equation (1) and equation(2) into equation (3)

x + y + z = 42

x +  \frac{x}{2} + 2x = 42

Multiply through by 2

2x + x + 4x = 84

7x = 84

Divide both-side of the equation by 7

\frac{7x}{7} = \frac{84}{7}

x = 12

Therefore, Gina is 12 years old

7 0
3 years ago
If f(x)=-4x+1 what is f(-x/2)
guapka [62]

Answer:

f(\frac{-x}{2})=2x+1

Step-by-step explanation:

given f(x)=-4x+1................(1)

x=\frac{-x}{2}  put in equ (1)

f(x)=-4x+1

f(\frac{-x}{2} )  =-4(\frac{-x}{2})+1

 f(\frac{-x}{2})=2x+1 answer

5 0
3 years ago
Ugh I need to know number ten right now!
erastovalidia [21]
Uh, rude. The answer to this is that Rico should've moved the decimal to the right twice, not the left.
3 0
3 years ago
Read 2 more answers
Solving systems by elimination with multiplication: 8x+7y=20 and 4x-4y=-20
borishaifa [10]
If you put 0 in the place of x or y, which every one you choose, it will cancel it or and you can just divide the number next to it by the answer (-20, 20). Take it one step at a time, don't try to do both at the same time.
3 0
2 years ago
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