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pashok25 [27]
3 years ago
10

Help me please i will rate you 5 stars

Mathematics
1 answer:
daser333 [38]3 years ago
6 0

Answer:

yes she did

Step-by-step explanation:

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Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth 5y^2-8y=2
solmaris [256]

Answer:


Step-by-step explanation:

First, rewrite the equation (all terms should be in the left side):

5y^2-8y-2=0.

In this equation,

  • a=5;
  • b=-8;
  • c=-2.

Then the discriminant

D=b^2 -4ac=(-8)^2-4\cdot 5\cdot (-2)=64+40=104.

Then

y_1=\dfrac{-b+\sqrt{D}}{2a}=\dfrac{-(-8)+\sqrt{104}}{2\cdot 5}=\dfrac{8+2\sqrt{26}}{10}=\dfrac{4+\sqrt{26}}{5},\\ \\y_2=\dfrac{-b-\sqrt{D}}{2a}=\dfrac{-(-8)-\sqrt{104}}{2\cdot 5}=\dfrac{8-2\sqrt{26}}{10}=\dfrac{4-\sqrt{26}}{5}.

6 0
3 years ago
One and one over seventh times three fifths
andreyandreev [35.5K]

Answer:

24/35

Step-by-step explanation:

1) Convert your mixed number (1 and 1/7) to an improper fraction by multiplying your whole number (1) and your denominator (7) which gives you 7. Then add your numerator (1) to that which gets you 8. Then take the original denominator (7) and turn it into improper where your new numerator is 8 and your denominator stays 7. (If that doesn't make much sense then you can look up how to change mixed numbers into improper fractions.)

2) Multiply your numbers straight across.

8/7 * 3/5

8*3= 24

7*5= 35

24/35  you can't simplify this, so 24/35 is your answer

8 0
3 years ago
Mrs. Dodson has a jar full of pennies and quarters. There are 120 coins in the jar worth a
Anton [14]

<em><u>Answer: 10.</u></em>

<em><u /></em>

<em><u>Step-by-step explanation:</u></em>

<em><u>DIVISION. 120/12.</u></em>

<em><u>That is hard! Here's a trick.</u></em>

<em><u>12x9= 99=9=108. Or 12x6=66+6=72.</u></em>

<em><u>We will stick with 12x9,  that equals 108.</u></em>

<em><u>We should add another 12 until we get to 120. </u></em>

<em><u>108+12=120. That is 10 times. The trick was...</u></em>

<em><u>dividing by 12 is hard, so lets say 12x4. I can put 4 and 4 together.</u></em>

<em><u>44 then and another 4. That is 48. So 12x4=48.</u></em>

<em><u /></em>

5 0
3 years ago
Clayton says that 2 1/2 + 3 3/5 will be more than 5 but less than 6 since 2 + 3 is 5. Is Clayton’s reasoning correct? Prove him
antoniya [11.8K]
He is wrong...

2 1/2 + 3 3/5 = 97/20

Simplified, I believe the answer is 4 17/20
7 0
4 years ago
What is 3/4 divided by 1/2
exis [7]

Answer: 3/2

Step-by-step explanation: the answer would be 3/2 as an improper fraction or 1 and 1/2 as a mixed number

4 0
3 years ago
Read 2 more answers
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