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Zarrin [17]
2 years ago
15

What’s the expression 1/8+2/5

Mathematics
1 answer:
Lerok [7]2 years ago
8 0

Answer:

The answer is 21/40

Step-by-step explanation:

(1×5)+(2×8)8×5

=5+16/40

=21/40

Have a blessed day :)

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Semmy [17]

Answer: 410526 books

Step-by-step explanation:

Let x equal the total number sold.

x × 0.076 = 31,200

x = 410526 books

5 0
3 years ago
PLease please help if you know the answer 100%
fgiga [73]

Answer:

  4x +7y

Step-by-step explanation:

(8x +10y) +(-4x -3y) = x(8 -4) +y(10 -3) = 4x +7y

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Combine like terms. Pay attention to signs.

5 0
3 years ago
Subtract.<br> Your answer should be a polynomial in standard form.<br> (d² + 6d +9) - (d^3+ 6d + 9)
satela [25.4K]

Answer:

-d^3 + d^2

Step-by-step explanation:

5 0
3 years ago
Which parabola will have one real solution with the line y = x – 5? y = x2 + x – 4 y = x2 + 2x – 1 y = x2 + 6x + 9 y = x2 + 7x +
nikdorinn [45]

Answer:

y = x² + 7x + 4

Step-by-step explanation:

<u>First option</u>

System of equations:

y = x² + x – 4

y = x – 5

Replacing:

x - 5 = x² + x – 4

0 = x² + x – 4 - x + 5

0 = x² + 1

Discriminant:

b²-4*a*c

0²-4*1*1

-4 < 0   then the equation has no real roots

<u>Second option</u>

System of equations:

y = x² + 2x – 1

y = x – 5

Replacing:

x - 5 = x² + 2x – 1

0 = x² + 2x - 1  - x + 5

0 = x² + x + 4

Discriminant:

b²-4*a*c

1²-4*1*4

-15 < 0   then the equation has no real roots

<u>Third option</u>

System of equations:

y = x² + 6x + 9

y = x – 5

Replacing:

x - 5 = x² + 6x + 9

0 = x² + 6x + 9  - x + 5

0 = x² + 5x + 4

Discriminant:

b²-4*a*c

5²-4*1*4

9 > 0 then the equation has two different real roots

<u>Fourth option</u>

System of equations:

y = x² + 7x + 4

y = x – 5

Replacing:

x - 5 = x² + 7x + 4

0 = x² + 7x + 4 - x + 5

0 = x² + 6x + 9

Discriminant:

b²-4*a*c

6²-4*1*9

0  then the equation has one real root

4 0
3 years ago
Torri had $20 to buy a birthday present for her dad. She decided to buy a DVD for $18. The sales tax is 7%. Does she have enough
arlik [135]
YES, IF YOU ADD 18 AND 7% YOU GET 19.26
5 0
3 years ago
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