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podryga [215]
3 years ago
11

Rosa wanted to solve the equation x – 3 = 7. She subtracted 3 from both sides. What should she have done differently?

Mathematics
2 answers:
docker41 [41]3 years ago
7 0

Answer:

x + 3 = 10

Step-by-step explanation:

Add three to both sides

yawa3891 [41]3 years ago
4 0
She should have added 3 instead of subtracting because u need to do inverse operation when solving equations.
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What’s 2564734222 divided by 9
Mice21 [21]
284970469.111 is the answer
6 0
3 years ago
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The cost for a company to manufacture x bracelets can be represented by the function C(x). Complete the sentence below using the
gizmo_the_mogwai [7]
The cost for a company to manufacture "x".... 
These statements tell you what X is. (The word cost refers to what the function will tell us. In other words C(x) = The Cost for the Company)) 

So as we keep going the problem goes onto: 
.... bracelets
So the number of bracelets is X. 

The function is: C(x) 

And how functions work are quite simple. You plug in a number (x) and get out a number (y).

So, C(256) = 1536

So, they made 256 bracelets at a cost of 1536 dollars. 

This is no different than if I said the function was: 
C(x) = 6x
And then asked, what would the function equal when x = 256. It's the same thing, so don't let it trip you up! 

Answer 1: 1536$
Answer 2: 256

3 0
4 years ago
Read 2 more answers
If 2(4x + 3)/(x - 3)(x + 7) = a/x - 3 + b/x + 7, find the values of a and b.
zmey [24]

Answer:

a=3 and b=5.

Step-by-step explanation:

So I believe the problem is this:

\frac{2(4x+3)}{x-3}(x+7)}=\frac{a}{x-3}+\frac{b}{x+7}

where we are asked to find values for a and b such that the equation holds for any x in the equation's domain.

So I'm actually going to get rid of any domain restrictions by multiplying both sides by (x-3)(x+7).

In other words this will clear the fractions.

\frac{2(4x+3)}{x-3}(x+7)}\cdot(x-3)(x+7)=\frac{a}{x-3}\cdot(x-3)(x+7)+\frac{b}{x+7}(x-3)(x+7)

2(4x+3)=a(x+7)+b(x-3)

As you can see there was some cancellation.

I'm going to plug in -7 for x because x+7 becomes 0 then.

2(4\cdot -7+3)=a(-7+7)+b(-7-3)

2(-28+3)=a(0)+b(-10)

2(-25)=0-10b

-50=-10b

Divide both sides by -10:

\frac{-50}{-10}=b

5=b

Now we have:

2(4x+3)=a(x+7)+b(x-3) with b=5

I notice that x-3 is 0 when x=3. So I'm going to replace x with 3.

2(4\cdot 3+3)=a(3+7)+b(3-3)

2(12+3)=a(10)+b(0)

2(15)=10a+0

30=10a

Divide both sides by 10:

\frac{30}{10}=a

3=a

So a=3 and b=5.

4 0
3 years ago
Read 2 more answers
PLEASE HELPP
Sidana [21]

Answer:

d = 9/10

Step-by-step explanation:

Hi,

d divided by 5/6 = 3/4

You can't divide fractions, instead, you flip the fraction and multiply. So, in this case, you would flip 5/6 to get 6/5 and multiply it by 3/4 to get d.

d ÷ 5/6 = 3/4

Multiply both sides by 6/5 (remember to flip)

d = 3/4 x 6/5

(when multiplying fractions, you can multiply straight across)

d = 18/20

(simplify - both numbers can be divided by 2)

d = 9/10

Hope this helps :)

3 0
3 years ago
Read 2 more answers
Please help! I’m not sure what to do!
mojhsa [17]
The answer is 1 1/12
3 0
4 years ago
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