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mrs_skeptik [129]
3 years ago
15

How do I solve this: (-3z2+z+13)-(6z2+7)

Mathematics
1 answer:
vesna_86 [32]3 years ago
7 0
I know that you should use PEMDAS, what grade are you in this sems advances for you
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I don’t know how to answer my this math question, it’s easy so please help
Fofino [41]

which one ?

the bottom or the top or is this a trick

7 0
3 years ago
Krutika and Natasha win some money and share it in the ratio 1:2. Krutika gets £8. How much did they win in total?
Inessa [10]

Answer:£24

Step-by-step explanation:

Let the total money be represented by Y

Total ratio =1+2=3

Krutika's share =1/3 × Y

8= 1/3×Y

Y=8÷(1/3)

Y= 8×3

Y=£24

The total Money they won was 24

6 0
3 years ago
The population of algae in an
mezya [45]

The equation is y = 20(1.40)^x

where x is the number of days and y is the future amount after x days go by

The 1.40 is from the fact that 1+r = 1+0.40 = 1.40, where r is the decimal form of 40%, so r = 0.40

-----------------------------

Plug in x = 7 to get

y = 20(1.40)^x

y = 20(1.40)^7

y = 210.827008

y = 211

We round to the nearest whole number since it doesn't make much sense to have a fractional portion of an algae. After 7 days, there are about <u>211</u> algae.

5 0
3 years ago
Which represent like terms in the model of the equation?
Nezavi [6.7K]

Answer:

Option 2

Step-by-step explanation:

Like terms are terms with the same variable and the same power.

Let's analysis and write the equation of each model to see if which of them has like terms:

Option 1:

We have x x => 2x

1 1 1 => 3

Equation of model=> 2x + 3

2x and 3 are unlike terms

Option 2:

We have x x => 2x

x x x => 3x

Equation of model=> 2x + 3x

2x and 3x are like terms

Option 3:

We have x x x => 3x

1 1 1 => 3

Equation of model=> 3x + 3 (contains unlike terms)

Option 4:

We have x => x

1 => 1

Equation of model=> x + 1 (unlike terms)

✔️The second option is the answer

8 0
3 years ago
The value of y is directly proportional to the value of x . If y=55 when x = 120 , what is the value of y when x = 60
Lady_Fox [76]

Answer:

The answer would be 27.5

Step-by-step explanation:

Divide 55 by 2

3 0
3 years ago
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