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4 years ago

PLEASE HELP I marked the ones I'm stuck onmust show work

Mathematics

1 answer:

Maurinko [17]4 years ago

8 0

Use Slide method for some of them, some are perfect squares:

Watch this video and try it a few times, pay attention to the signs when you are seeing which one will be negative when you multiply it out, in picture is me working out all problems requested.

Ask your brother for further help!

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WDGWADgawYd awIdwaiudwaiudgaidgawida

emmasim [6.3K]

Um ok then xxxtdysfsfofixuctdyvv do trduddidjsixdidkcyfdkxoxddfrthgigigviiicvivivtc

7 0

3 years ago

One factor of the function f(x) = x ^ 3 - 8x ^ 2 + 17x - 10.5(x - 5) Describe how to find the x-intercepts and the y-intercept o

pickupchik [31]

Answer:

x-intercept(s): (−1.9900717, 0)

y-intercept(s): (0, 52.5)

Step-by-step explanation:

To find the x-intercept, substitute in $0$ for $y$ and solve for $x$ . To find the y-intercept, substitute in $0$ for $x$ and solve for $y$ .

$f(x)=y$

$(x)=x$

x-intercept

To find the x-intercept(s), substitute in $0$ for $y$ and solve for $x$ .

$f(x) = x ^ 3 - 8x ^ 2 + 17x - 10.5(x - 5$

$=\bold{0}=x^3-8x^2+17x-10.5\left(x-5\right)$

$=0\cdot \:10=x^3\cdot \:10-8x^2\cdot \:10+17x\cdot \:10-10.5\left(x-5\right)\cdot \:10$

$=0=10x^3-80x^2+170x-105\left(x-5\right)$

$=0=10x^3-80x^2+65x+525$

$=10x^3-80x^2+65x+525=0$

$=10x^2-99.90071\dots x+263.80959\dots \approx \:0$

$\bold{x\approx \:-1.99007\dots}$

y-intercept

$f(x) = x ^ 3 - 8x ^ 2 + 17x - 10.5(x - 5$

$=y=\bold{0}^3-8(\bold{0})^2+17(\bold{0})-10.5\left(\bold{0}-5\right)$

$=y=0-8\cdot \:0+17\left(0\right)-10.5\left(0-5\right)$

$=y=0-8\cdot \:0+17\cdot \:0-10.5\left(0-5\right)$

$=y=0-0+0-\left(-52.5\right)$

$=0-0+0+52.5$

$\bold{y=52.5}$

8 0

2 years ago

Suppose you want to have $400,000 for retirement in 35years. Your account earns 4% interest.

Sedaia [141]

$\begin{equation*} \$437.76 \end{equation*}$

1) This is a question for Annuity usage. Note that we'll need the following formula below:

$\begin{gathered} P=\frac{A(\frac{r}{n})}{\lbrack(1+\frac{r}{n})^{nt}-1\rbrack} \\ P=\frac{400000(\frac{0.04}{12})}{\lbrack(1+\frac{0.04}{12})^{12\cdot35}-1\rbrack} \\ P=\frac{400000\cdot\frac{0.04}{12}}{\left(1+\frac{0.04}{12}\right)^{35\cdot\:12}-1} \\ P=\frac{400000\cdot\frac{0.04}{12}}{1.0033^{420}-1} \\ P=437.76563...\approx\$437.76 \end{gathered}$

Note that P is the value you'll need to deposit each month so that in 35 years you'll have $400,000 for your retirement.

6 0

1 year ago

Isaac take 5 minutes to ride his bike to down the hill to school and 10 minutes to ride up the hill from school. He attends scho

Delvig [45]

In the given question, it is given that

Isaac take 5 minutes to ride his bike to down the hill to school and 10 minutes to ride up the hill from school. He attends school Monday through Friday.

So per day, from Monday to Friday, Issac rides 15 minutes.

And in 2 weeks, Issac have to ride 10 days.

So in 10 days, Issac rides,

$10*15 = 150 minutes$

7 0

3 years ago

—6+(-3)+(-7) 4 it’s over 4 Asap

slamgirl [31]

Answer:

-16

Step-by-step explanation:

simplify the expression

6 0

4 years ago

Read 2 more answers

PLEASE HELP I marked the ones I'm stuck onmust show work ​

PLEASE HELP I marked the ones I'm stuck onmust show work