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solmaris [256]
2 years ago
7

Subtract – 2.2 + 3x – 9 from 8x2 + 10x – 10.

Mathematics
1 answer:
Ksju [112]2 years ago
6 0

Answer:

=3x−11

2(4x2+5x−5)

Step-by-step explanation:

both subtracted: −8x2−7x−1

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parker correctly answered 70% of the questions on his math test. If he answered 35 questions correctly, how many questions were
Alexandra [31]

Let the total number of questions in the math test be defined by the variable x.

Now, we know that Parker correctly answered 35 questions. These 35 questions make 70% of the total number of questions on his math test.

The information we have above can be expressed as an equation given below:

70% of x=35

This can be rewritten as:

\frac{70}{100}x=35

Thus, to find the total number of questions we will have to isolate x.

\therefore x=\frac{35\times 100}{70}=50

Therefore, there were a total of 50 questions in the math test.

4 0
3 years ago
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My tens digit is less than 7. I am one away from being a multiple of 5. If you half me you will not get a whole number. Who am I
Len [333]

Answer:

its B.429

Step-by-step explanation:

20<70

429+1=multiple of 5

429÷2=214.5

so the answer is 429

 

6 0
3 years ago
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3 is added to five times number, and the result is multiplied by 4. the final result is 72. what is the number​
Dima020 [189]

Answer:

The number is 3

Step-by-step explanation:

Hi,

4 ( 3 + 5x) = 72

12 + 20x = 72

20x = 60

x = 3

Hope this helps :)

7 0
2 years ago
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1. Find the length of X (in the picture) plssss I need help.​
Vedmedyk [2.9K]

Step-by-step explanation:

\frac{5}{4}  =  \frac{x}{6}  \\ 4x = 30 \\ x = 7.5

3 0
3 years ago
(-3, -4) and (-5, y); m = -9/2
Mazyrski [523]

Answer:

the answer would be y= -40

4 0
2 years ago
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