3 years ago

I need help on this question

Mathematics

1 answer:

Molodets [167]3 years ago

8 0

9P4= 3024

9×8×7×6 = 3024

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brilliants [131]

Answer:

The answer is 100% without a doubt A

Step-by-step explanation:

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A student earns scores of 80, 87, and 82 on the first three of four tests. If the student wants to achieve a quiz average of 85,

aleksandrvk [35]

Answer:

Step-by-step explanation:

85= $\frac{80+87+82+x}{4}$ then multiply the 4 over and subtract 80, 87, and 82 to find x which gives you 91

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2 years ago

Double the product of 4y and 3b if y=2 and b=1.

Aleksandr-060686 [28]

Answer:

Step-by-step explanation:

Double the product of 4y and 3b

2 * ((4y) * (3b))

y = 2 and b = 1

2 * ((4 * 2) * (3 * 1))

2 * (8 * 3)

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3 years ago

Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x?

zheka24 [161]

$\bf{Hey\ there!}$

$\bf{Quadratic\ formula\ is:}$ $\bf{x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}} \ or \ you\ could\ say\ ax^2+bx+c=0$

$\bf{\bullet\ First: subtract\ by\ 2x\ on\ your\ sides\ that\ you're\ working\ with}$

$\bf{Like:x^2+20-2x=2x-2x}$

$\bf{We\ get:x^2-2x+20=0}$

$\bf{\bullet \ a=1}\\ \bf{\bullet \ b=-2}\\ \bf{\bullet \ c=20}$

$\bf{x=\frac{-(-2)\pm\sqrt{(-2)^2-4(1)(20})}{2(1)}$

$\bf{(-2)^2-4(1)(20)=-76} \\ \\ \bf{2(1)=2}$

$\bold{-(-2)=-1(-2))=+2}$

$\bf{x=\frac{2\pm\sqrt{-76}}{2}}$

$\bf{Thus\ there\ is\ NO\ REAL\ SOLUTIONS}$

$\text{Good\ luck\ on\ your\ assignment\ and\ enjoy\ your\ day!}$

$\frak{LoveYourselfFirst:)}$

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Martina needs to memorize words on a vocabulary list for German class. She has memorized 20 of the words, which is four-fifths o

tresset_1 [31]

Four fifths of 25 is 20 so the answer is 25

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