9x^2+5x-1=0 use quadratic formula to solve for x

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Answer 1

Answer: $9x^2+5x-1=0\n \Delta=5^2-4\cdot 9\cdot (-1)=25+36=61\n √(\Delta)=√(61)\n x_1=(-5-√(61))/(2\cdot9)=-(5+√(61))/(18)\n x_2=(-5+√(61))/(2\cdot9)=-(5-√(61))/(18)$

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steps for patient medication decrease 25 mg per day for one week. Whats the change at end of the week?

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The answer would be 25 mg minus the last day of the week

The change at the end of the week is 175

Which equation has the same soultions as x^2+6×-7=0

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$x^2+6x-7=0 \n a=1 \n b= 6 \n c=-7 \n \n \boxed{\boxed{\Delta=b^2-4ac}} \n \n \Delta=6^2-4*1*(-7) \n \Delta=36-(-28) \n \Delta=64 \n \Delta\ \textgreater \ 0 \Rightarrow \text{we have 2 solutions :} X_1 \ and X_2 \n \n \boxed{X_1= (-b- √(\Delta) )/(2a) } \Rightarrow X_1= (-6-8)/(2)=-7 \n \n \boxed{X_2= (-b+ √(\Delta) )/(2a) } \Rightarrow X_2= (-6+8)/(2) =1$

Write an inequality to represent the phrase: The sum of a number and 7 is no more than 53.

Answers

n+7≤53

The sum of a number, which I have named 'n', and 7 can be written as the expression:

n+7

remember the word 'is' in a written problem indicates where you'll most likely use an =,≥,≤ sign. Since they say that it is 'no more than' we know that n+7 is less than or equal to the given number, so we use '≤'.

n+7≤

the number it is less than or equal to is 53, so now we have the completed inequality of:

n+7≤53

sum means add
a number=x
7=7
is no more than, means is equal to or less than aka <
53=53

x+7<53

Izzy is making cookies. The recipe for 1/4 cup of butter and 3/8 cup of sugar. How much sugar would Izzy use if she used 1 cup of butter? Write your answer as a mixed number

Answers

To solve this equation, we have to set up a proportion, because we want to keep the ratio of butter to sugar equal between the two recipes. Let x represent the amount of sugar that we are trying to find.

1/4 cup butter/3/8 cup sugar = 1 cup butter/ x cup sugar

To solve this proportion, we need to use cross products, or the multiplication of the numerator of one fraction by the denominator of the other, and setting them equal to one another. If done properly, the resulting equation is:

1/4x= 3/8

Finally, we just need to divide both sides by 1/4, which is the coefficient of x, as we are trying to get x alone. Your final answer is

x=1.5.

Therefore, this means that if Izzy uses 1 cup of butter, she would use 1 1/2 cups of sugar.

What is the total amount 2 5/8 + 1 3/4 =

Answers

Answer:4 3/8

Step-by-step explanation: you add the full numbers together then you have to change the denominator of 3/4 to be /8 and what you do to the bottom you have to do to the top then you get 3 11/8 you then see how many 8 go into 11 to se if you need to add another full number and the numbers left over go back to the 8 making the awnser 4 and 3/8.

A gardener weeds 2/3 of a flower bed in 6 min. How much of the flower bed did the gardener weed in 1 min?

(50 pts) (This is my own experiment 2 see how fast Brainly is and how efficient!)

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(2/3 bed) / (6min) = ('x' bed) / (1min)

Cross-multiply:

(2/3 bed * 3min) = ('x' bed * 6min)

Divide each side by 6min:

1/3 bed = 'x' bed

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