I need to check my work but I’m not sure if it’s right

Mathematics

2 answers:

mr Goodwill [35]3 years ago

7 0

The equation is as read; 17.2 + 12.9 should equal 30.1.

Just add [looks like you subtracted instead] straight down getting 301 then moving the decimal down too.

julsineya [31]3 years ago

4 0

The answer would be 30.1 since you have to add the decimals first and then the whole numbers

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natulia [17]

Take Saturdays total of $620 and subtract Fridays total of $460 to get $160. Divide that by the difference of the number of pies sold on Friday and Saturday to get $8. Take the $8 and multiply by number of pies sold on Friday (20) to get $160. Take that number and subtract it from the total sold on Friday ($460) to get $300. Divide that by how many cakes were sold on Friday (30) and get $10.
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3 years ago

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Finger [1]

Solution:

we have been asked to verify that -5, 1/2, and 3/4 are the zeroes of the cubic polynomial $4x^3+20x^2+2x-3$

To verify that whether the given values are zeros or not we will substitute the values in the given Polynomial, if it will returns zero, it mean that value is Zero of the polynomial. But if it return any thing other than zeros it mean that value is not the zero of the polynomial.

Let $f(x)=4x^3+20x^2+2x-3\\\\\text{when x=-5}\\\\f(-5)=4(-5)^3+20(-5)^2+2(-5)-3=-13\\\\\text{when x=}\frac{1}{2}\\$