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4 years ago

D

Mathematics

1 answer:

natulia [17]4 years ago

7 0

Answer:

D) 21,14

Step-by-step explanation:

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2+2x8= ? To the 10th power

ch4aika [34]

Answer:

2+2×8=18

Step-by-step explanation:

2+2×8

2+16

4 0

3 years ago

Read 2 more answers

Jeanine pays $4.75 a week to dry-clean her uniform. how much money did Jeanine earn this week after paying these expenses? if he

lina2011 [118]

Answer:

740.75

Step-by-step explanation:

745.50 - 4.75 = 740.75

5 0

3 years ago

The maximum value of the function: f(x)= -5 x ^2 +30x-200 is?

VARVARA [1.3K]

Answer:

$\displaystyle - 155$

Step-by-step explanation:

we are given a quadratic function

$\displaystyle f(x) = - 5 {x}^{2} + 30x - 200$

we want to figure out the minimum value of the function

to do so we need to figure out the minimum value of x in the case we can consider the following formula:

$\displaystyle x _{ \rm min} = \frac{ - b}{2a}$

the given function is in the standard form i.e

$\displaystyle f(x) = a {x}^{2} + bx + c$

so we acquire:

b=30
a=-5

thus substitute:

$\displaystyle x _{ \rm min} = \frac{ - 30}{2. - 5}$

simplify multiplication:

$\displaystyle x _{ \rm min} = \frac{ - 30}{ - 10}$

simply division:

$\displaystyle x _{ \rm min} = 3$

plug in the value of minimum x to the given function:

$\displaystyle f (3)= - 5 {(3)}^{2} + 30.3 - 200$

simplify square:

$\displaystyle f (3)= - 5 {(9)}^{} + 30.3 - 200$

simplify multiplication:

$\displaystyle f (3)= - 45 + 90- 200$

simplify:

$\displaystyle f (3)= - 155$

hence,

the minimum value of the function is -155

5 0

3 years ago

I need help with number 18 & 19 please

lora16 [44]

Number 19 I think is if you add the awnser to one of the numbers you where subtracting and you get the other number you where subtracting you are right like...

Lets say you had the problem 3-2 which is obviously 1 but if you did 2+1 it's 3 so that's how you check.

5 0

4 years ago

If P(x) = 8x and R(x) = 9x -8, find P(x) • R(x).

Airida [17]

Answer:

Given

P( x) = 8x

R ( x) = 9x - 8

Step-by-step explanation:

P(x) . R ( x) 

= 8x ( 9x - 8 )

= 72x^2 - 64x

8 0

3 years ago