3 years ago

Need help, timed assignment !!

Mathematics

1 answer:

Natali5045456 [20]3 years ago

4 0

Answer:

Step-by-step explanation:

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Someone please help me with problem #7 !!!

ser-zykov [4K]

Answer: b and d

Step-by-step explanation:

Since the roots are x=2 and x=6, we can write the equation as

$f(x)=a(x-2)(x-6)$

Substituting in the coordinates of the vertex,

$-4=a(4-2)(4-6)\\\\-4=-4a\\\\a=1$

So, the equation is $f(x)=(x-2)(x-6)$

On expanding, we get $f(x)=x^2 - 8x+12$

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2 years ago

bob left 4.50 as a tip for a waiter from a bill that totaled to 22.50 what percent of the total bill did bob leave as tip

Nonamiya [84]

Answer:

20% tip.

Step-by-step explanation:

4.5/22.5=.2

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3 years ago

Solve the system of equations by substitution x+y=18, y=5x

Artyom0805 [142]

Answer:

(3, 15 )

Step-by-step explanation:

Given the 2 equations

x + y = 18 → (1)

y = 5x → (2)

Substitute y = 5x into (1)

x + 5x = 18

6x = 18 ( divide both sides by 6 )

x = 3

Substitute x = 3 into (2) for corresponding value of y

y = 5(3) = 15

Solution is (3, 15 )

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4 years ago

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