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fenix001 [56]
2 years ago
6

(-3x² + 9.2 - 9) + (-9x² + 9x + 3)​

Mathematics
1 answer:
RoseWind [281]2 years ago
4 0
-12X (2) + 9x +3.2 there ya go
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A woman bought some large frames for $14 each and some small frames for $5 each at a closeout sale. If she bought 24 frames for
masya89 [10]
She bought 5 large ones and 19 small ones!


Because 5*14 = 70 and 5*19=95 and I’d you add them together it equals 165
3 0
3 years ago
The bacteria starts at 2million.The doctor prescribes an antibiotic that reduces the bacteria population to 1/4 of its size each
Bogdan [553]

i think its B but iam not sure

8 0
3 years ago
The sum of two numbers is 14. The larger number minus three times the lesser number is -2. What is the lesser number?
V125BC [204]

Answer:

c) 4

Step-by-step explanation:

<u><em>The sum of two numbers is 14. The larger number minus three times the lesser number is -2</em></u>

<u><em /></u>

To solve this question, we need to write the statement mathematically;

Let the two numbers be x and y

"The sum of two numbers is 14" can be mathematically written as x+y = 14

and

"The larger number minus three times the lesser number is -2" can be mathematically written as x -  3y  = -2

x + y = 14  ------------------(1)

x - 3y= -2 -------------------(2)

Subtract equation (2) from equation (1)

[x - x = 0          y - (-3y)=4y     14-(-2)=16]

4y  = 16

To get the value of y divide both-side of the equation by 4

4y/4 = 16/4

y  =   4

Substitute y=4 into equation (1)

x + y =14

x +4 =14

Subtract 4 from both-side of the equation

x + 4 -4  = 10]-4

x = 10

x=10 and y =4

Therefore the lesser number is 4

7 0
2 years ago
No idea how to do this equation. Its applying system's of linear equations.
icang [17]
What you want to do is take one of the 2 equations and isolate one variable. you will then use the value that you find for the variable and plug it back into the other equation. here is how:

This would be easiest to do with the second equation in the set since the x is not being multiplied by anything. So lets isolate the x in the second equation.

add 0.9y to both sides and you get:

x=4.5+0.9y

we now know what x is equal to in terms of y. so lets replace the x in the first equation with the new value. You get:

1.5(4.5+0.9y)-1.9y=-29

Now just solve for y:
6.75+1.35y-1.9y=-29
1.35y-1.9y=-35.75
-0.55y=-35.75
y=65

so now you know that y=65 so plug 65 in as y in the second equation to find x

x-0.9*65=4.5

Now simply solve for x

x-(-58.5)=4.5
x+58.5=4.5
x=-54

Hope this helped! :)



3 0
3 years ago
Question is on the picture
Sedaia [141]
-2 then -5/2 and then 1.7
8 0
3 years ago
Read 2 more answers
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