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3 years ago

I need help answering question 1 and question 2

Mathematics

1 answer:

valentinak56 [21]3 years ago

4 0

Answer:

Step-by-step explanation:

1. y= 1-x² is quadratic because has the variable x to the second power

y = -x² +1 has quadratic term -x², and constant term is 1

2. y= 3x-5 +4x²

a. quadratic term is 4x² because has the variable x to the second power

b. linear term is 3x because has the variable x to the power of one

c. constant term is -5 because the variable x to the power 0 so there is no x

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How to solve it ...<br><br>1. 5-2x²-6x<br>2. (x+3) (x+4)=0

givi [52]

$1.\\5-2x^2-6x=0\\-2x^2-6x+5=0\\\\a=-2;\ b=-6;\ c=5\\\\\Delta=b^2-4ac\to\Delta=(-6)^2-4\cdot(-2)\cdot5=36+40=76\\\\x_1=\frac{-b-\sqrt\Delta}{2a}\to x_1=\frac{6-\sqrt{78}}{2\cdot(-2)}=\frac{6-\sqrt{4\cdot19}}{-4}=\frac{6-2\sqrt{19}}{-4}=\frac{\sqrt{19}-3}{2}\\\\x_2=\frac{-b+\sqrt\Delta}{2a}\to x_2=\frac{3-\sqrt{19}}{2}$

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$2.\\(x+3)(x+4)=0\iff x+3=0\ \vee\ x+4=0\\\\x=-3\ \vee\ x=-4$

8 0

3 years ago

Equivalent expression of 75x-50

sveta [45]

If you mean factoring, then:
25(3x-2) = 0

x = 2/3

6 0

3 years ago

Read 2 more answers

When renting a car it costs 35$ per day to rent the car plus $0.20 yo rent the car for one day and drove d miles at the end of t

Savatey [412]

I t will be 7.4 miles because you have to it 35x.20 =7.4

8 0

3 years ago

Mean of 6 numbers is 41. Remove one number and the mean of the five numbers is 46. What is the unknown number

Alex17521 [72]

Answer:

- 16

Step-by-step explanation:

This is very tricky. Be careful how you do it.

The total of the six numbers is 6*41 = 246

The total of five numbers = 5*46 = 230

What have you you removed to make the number average go up with a smaller sample? The answer is a negative.

230 - 246 = - 16

6 0

3 years ago

3. JK is tangent to circle L. Find JL to two decimal places.

Alex777 [14]

Answer:

14.32

Step-by-step explanation:

Since this is a right triangle, we can us the Pythagorean theorem

a^2 + b^2 = c^2

3^2 + 14^2 = JL ^2

9+196 = JL ^2

205 = JL ^2

Taking the square root of each side

sqrt(205) = JL

14.31782106 = JL

To 2 decimal places

14.32

3 0

3 years ago