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2 years ago

Help me out pls, 20 points!

Mathematics

2 answers:

d1i1m1o1n [39]2 years ago

5 0

Answer:

75.5 is not equivalent because 75 1/2% to a decimal is 0.775

Step-by-step explanation:

Hope this helps

Roman55 [17]2 years ago

4 0

Answer:

OPTION B the correct answer.

$75 \frac{1}{2}\% = \frac{151}{200}$

$= 0.755$

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A quadratic function is a function of the form y=ax^2+bx+c where a, b, and c are constants. Given any 3 points in the plane, the

pochemuha

Answer:

The quadratic function whose graph contains these points is $y=-x^{2}-2x-2$

Step-by-step explanation:

We know that a quadratic function is a function of the form $y=ax^{2}+bx+c$ . The first step is use the 3 points given to write 3 equations to find the values of the constants a,b, and c.

Substitute the points (0,-2), (-5,-17), and (3,-17) into the general form of a quadratic function.

$-2=a*0^{2}+b*0+c\\c=-2$

$-17=a*-5^{2}+b*-5+c\\c=-25a+5b-17$

$-17=a*3^{2}+b*3+c\\ c=-9a-3b-17$

We can solve these system of equations by substitution

Substitute $c=-9a-3b-17$

$-9a-3b-17=25a+5b-17\\-9a-3b-17=-2$

Isolate a for the first equation

$-9a-3b-17=-25a+5b-17\\a=\frac{b}{2}$

Substitute $a=\frac{b}{2}$ into the second equation

$-9\left(-\frac{b}{2}\right)-3b-17=-2$

Find the value of b

$-9\left(-\frac{4b}{17}\right)-3b-17=-2\\ b=-2$

Find the value of a

$a=\frac{b}{2}\\ a=-1$

The solutions to the system of equations are:

b=-2,a=-1,c=-2

So the quadratic function whose graph contains these points is

$y=-x^{2}-2x-2$

As you can corroborate with the graph of this function.

8 0

3 years ago

What is the equation of the given in standard form? : y=-1.7x+8.5

olga_2 [115]

Y= -1.7x + 8.5
10( Y = -1.7 x + 8.5)
10Y = -17x + 85
+17x
17x + 10Y = 85

7 0

3 years ago

Read 2 more answers

PLEASE HELP ASAP WILL GIVE POINTS AND BRAINLIEST! TY BESTIES! Factor using GCF 20x^2+10x please show work

soldier1979 [14.2K]

Answer:

10x(2x+1)

Step-by-step explanation:

20x^2+10x

2*10*x*x + 10 *x

Factor out the common terms

10x(2x+1)

3 0

3 years ago

Pair of shoes usually sells for $70. If the shoes are 40% off, and sales tax is 5%, what is the total price of the shoes, includ

Illusion [34]

Answer:

$44.10

Step-by-step explanation:

The sale price of the shoes is (1.00-0.40)($70), or $42.

The final price, including tax, is (1.00 + 0.05)($42), or $44.10.

4 0

4 years ago

686.924 rounded to the nearest ten

bixtya [17]

690 because 86 is rounded up to 90

8 0

3 years ago

Read 2 more answers