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3 years ago

Evaluate The Expression 3(× - 1)² +2× - 7 for × = 3

2 answers:

8 0

(hope that helps )

ANSWER: 35

STEP BY STEP:

First rewrite the equation
(sry I cannot do exponents so I put the whole #) ⇩

3(x-1)2 + 2x -7

Then substitute x for what it is, in this case 3.

3(3-1)2 + 2x -7

Distribute

(9-3)2 + 2(3) - 7

Solve what is inside the parentheses

6 2 + 2(3) - 7

Solve exponents

36 + 2(3) - 7

Solve multiplication

36 + 6 - 7

Add

42 - 7

Subtract for final answer

35

jeyben [28]3 years ago

6 0

$\bf 3(x-1)^2+2x-7\implies \stackrel{\stackrel{x=3}{\cfrac{}{}}}{3[(3)-1]^2+2(3)-7}\implies 3[2]^2+6-7 \\\\\\ 3[4]+(-1)\implies 12-1\implies 11$

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A case of soda has 24 cans in it. There are 12 cases of soda. 1) What is the total number of cans of soda there are? 2) The soda

ElenaW [278]

Answer:

1) 288 cans

2) about 41 cans per team

Step-by-step explanation:

For number one you would multiply the numbers

24x12=288

there are 288 cans in total

2) divide 288 by 7 to distribute the cans evenly

each team gets about 41 cans

6 0

3 years ago

PLEASE PLEASE help me I WILL GIVE BRAINLIEST

ale4655 [162]

1. y 1.2y are like terms

Choice A

2. 2 + 17x-5x+9 =

11+12x

12x+11

Choice B

3. 3(5y+6)-4

15y+18-4

15y+14

Choice C

4. 81-27p

27(3-p)

Choice B

8 0

2 years ago

This is solving differential equations by sepeartion of variables

Brums [2.3K]

$\mathrm dy+k(y-70)\,\mathrm dx=0$

Separating variables gives

$\dfrac{\mathrm dy}{y-70}=-k\,\mathrm dx$

Integrating both sides gives

$\displaystyle\int\frac{\mathrm dy}{y-70}=-k\int\mathrm dx$
$\ln|y-70|+C_1=-kx+C_2$
$\ln|y-70|=-kx+C$

Solving for $y$ gives

$e^{\ln|y-70|}=e^{-kx+C}$
$y-70=e^{-kx}e^C$
$y=Ce^{-kx}+70$

As $y(1)=140$ , you get

$140=Ce^{-k}+70$
$70=Ce^{-k}$
$C=70e^k$

so the particular solution to this ODE is

$y=70e^ke^{-kx}+70$
$y=70e^{k(1-x)}+70$

Unless you have any more information, you're done.

5 0

2 years ago

129.2 is 38% of what number? a. 340 b. 29.4 c. 420 d. 49.1 Plss help

Alexus [3.1K]

Answer: A 340

Step-by-step explanation:

129.2/0.38=340

5 0

2 years ago

Read 2 more answers

Suppose k and l are fixed numbers. Since the following are lines with different slopes, the graphs of the two lines y=18x+k and

GenaCL600 [577]

answer:

Contd.

Explanation:

We will use the following well-known

Result : The eqn. of a line l passing through the pt. of

intersection of the lines l1:a1+b1+c1=0andl2:a2x+b2y+c2=0 is of

the form

Result :

3 0

3 years ago