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3 years ago

Answer the following questions,

Mathematics

2 answers:

denis-greek [22]3 years ago

6 0

Answer:

95% of 80 is 76 and 85% of 60 is 51.

Step-by-step explanation:

andriy [413]3 years ago

5 0

Answer:

a. 76, b. 60.

Step-by-step explanation:

a) 80 * 0.95 = 76.

b) 0.85 x = 51

x = 51/0.85 = 60.

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If f(x)=6-2x, Find the value for f(-1)

Katarina [22]

Answer:

f(-1)=8

Step-by-step explanation:

Just plug in x=-1 into the function:

f(x)=6-2x

y=6-2(-1)

y=6+2

y=8

So f(-1)=8

7 0

3 years ago

I need some help. Please

Ilya [14]

Are you able to ask your teacher?

7 0

3 years ago

Plz help this is my last math question I need help with!

charle [14.2K]

Answer:

He buys 8 desks and 6 chairs can i have branliest

Step-by-step explanation:

Set up a system of equations

desks = y chairs = x

x+y=14

125x + 515y = 4870

Eliminate,

-125x -125y = -1750

125x + 515 y = 4870

390 y = 3120

y = 8

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8 0

3 years ago

Read 2 more answers

2x2 – 9x + 2 = –1

Reika [66]

Answer:

C) The discriminant is greater than 0, so there are two real roots

Step-by-step explanation:

<u>Discriminant</u>

$b^2-4ac\quad\textsf{when}\:ax^2+bx+c=0$

$\textsf{when }\:b^2-4ac > 0 \implies \textsf{two real roots}$

$\textsf{when }\:b^2-4ac=0 \implies \textsf{one real root}$

$\textsf{when }\:b^2-4ac < 0 \implies \textsf{no real roots}$

$2x^2-9x+2=-1$

$\implies 2x^2-9x+3=0$

$\implies a=2, b=-9, c=3$

$\begin{aligned}b^2-4ac &=(-9)^2-4(2)(3)\\& =81-24\\&=57 > 0\implies \textsf{two real roots}\end{aligned}$

5 0

2 years ago

Can someone please help, ty!!

mr Goodwill [35]

Answer:

(-1,0)

Step-by-step explanation:

4 0

4 years ago

Read 2 more answers