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Alex_Xolod [135]
2 years ago
11

"The sum of seven-eighths of a number and 20 is 34 at minimum."

Mathematics
1 answer:
Gennadij [26K]2 years ago
6 0

Answer:

Anything greater than or equal to 17.

Step-by-step explanation:

7/8 of 17 is 14.875

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What is the solution of 2|2x-1|-8=18?
Maurinko [17]

Solve for |2x-1|:

2|2x-1|-8=18\implies2|2x-1|=26\implies|2x-1|=13

Now if 2x-1\ge0, we have |2x-1|=2x-1 and

2x-1=13\implies2x=14\implies x=7

On the other hand, if 2x-1, then |2x-1|=-(2x-1)=1-2x and

1-2x=13\implies-2x=12\implies x=-6

4 0
3 years ago
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Need an answer for question 7 HURRY PLEASE 20 POINTS
Andrei [34K]

Answer:

2x^2 = 6x - 5.

-x^2 - 10x = 34.

These have only complex roots/

Step-by-step explanation:

3x^2 - 5x = -8

3x^2 - 5x + 8 = 0

There are complex roots if the discriminant  9b^2 - 4ac) is negative.

Here the discriminant D = (-5)^2 - 4*-5*8 = 25 + 160

This is positive so the roots are real.

2x^2 = 6x - 5

2x^2 - 6x + 5 = 0

D = (-6)^2 - 4*2*5 =  36 - 40 = -4

So this has no real roots only complex ones.

12x = 9x^2 + 4

9x^2 - 12x + 4 = 0

D = (-12)^2 - 4*9 * 4 = 144 - 144 = 0.

- Real roots.

-x^2 - 10x = 34

x^2 + 10x + 34 = 0

D = (10)^2 - 4*1*34 = 100 - 136 = -36.

No real roots = only complex roots.

7 0
3 years ago
HELP ME IT'S URGENT I COULD FAIL
hjlf

Answer:

pm+2=8

Step-by-step explanation:

Given,

m=3

p=3

We know,

pm+2=3(3)+2

=3×3+2

=6+2

=8

5 0
2 years ago
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6(a + 5) = 42<br><br> ...................................
Elan Coil [88]
It’s 2 if I did my math right because I did it 2 tones and both of the times I got 2
5 0
3 years ago
0.00000003 in scientific notation
tester [92]

Answer:

3×10x^{-8}

Step-by-step explanation:

0.00000003

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

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