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3 years ago

PLEASE HELP :)

Mathematics

2 answers:

Gnom [1K]3 years ago

5 0

Answer:

Math can help us do many things that are important in our everyday lives. ... As a parent, you could talk to your teen about how you use math in your daily life. You ... Share with your child the examples of everyday math applications, which are listed ... Your teen will learn skills in algebra class that will help them with money.

Step-by-step explanation:

Colt1911 [192]3 years ago

4 0

Math can help you if you ever wanna build a desk in the future;)

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Sam is observing the velocity of a car at different times. After two hours, the velocity of the car is 50 km/h. After six hours,

Alexeev081 [22]

Part A)

$\bf \begin{array}{ccllll}
hours(x)&velocity(y)\\
-----&-----\\
2&50\\
6&54
\end{array}\\\\
-------------------------------\\\\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 2}}\quad ,&{{ 50}})\quad 
% (c,d)
&({{ 6}}\quad ,&{{ 54}})
\end{array}$

$\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{54-50}{6-2}\implies \cfrac{4}{4}\implies 1
\\\\\\
% point-slope intercept
y-{{ y_1}}={{ m}}(x-{{ x_1}})\implies y-50=1(x-2)\\
\left. \qquad \right. \uparrow\\
\textit{point-slope form}
\\\\\\
y-50=x-2\implies \boxed{y-x=48}\impliedby 
\begin{array}{llll}
standard\\
form
\end{array}$

part B)

well, to graph a LINEar equation, since it's just a LINE, you simply need two points to graph a line, and since we know that y - x = 48.... if you want to know what's "y" when x = 7? or 7 hours, well

y - (7) = 48
y = 48 + 7
y = 55

so.. that's the point for the 7th hour, 7, 55, and you can pick any other point above, and graph it away.

6 0

3 years ago

Which of the following represents the year when the state will reach and surpass a population of 1,800,000?

sineoko [7]

Since p is in thousands, let p = 1800.

$T(1800) = -496 + 70.17ln(1800)$
$T(1800) \approx 29.962...$
$1995 + T(1800) \approx 2025$

So, in the year 2025, USA will surpass 1 800 000 in the population.

8 0

3 years ago

What is the factored form of r27-s30?

lorasvet [3.4K]

This is what I get First is to get them to perfect squares . R27 = r9^3 S30= s10^3 =(a-b)(a^2+ab+b^2) Where a=r9 and b=s10 (R9-s10)((r9)^2+r9+s10+(s10)^2) Now simplify To get (R9-s10)(r18-r9+s10+s20)

7 0

3 years ago

Read 2 more answers

Please help 7th grade math question? URGENT! awarding brainliest!

Ivenika [448]

correct Option is B i.e, $72x^2+288x^2-216x$ whose simplified form is: $360x^2-216x$

Step-by-step explanation:

We need to solve the expression:

$2[(6x)(6x)]+4[(12x - 9)(6x)]$

Solving:

$2[(6x)(6x)]+4[(12x - 9)(6x)]\\=2[36x^2]+4[(12x*6x)-(9*6x)]\\=72x^2+4[72x^2-54x]\\=72x^2+288x^2-216x\\=360x^2-216x$

So, correct Option is B i.e, $72x^2+288x^2-216x$ whose simplified form is: $360x^2-216x$

Keywords: Surface area of the rectangular prism

Learn more about surface area of the rectangular prism at:

#learnwithBrainly

4 0

3 years ago

Question 12 plz help

harkovskaia [24]

Answer:

See the attachment for the appropriate choice.

Step-by-step explanation:

Both equations are in slope-intercept form. Both have a y-intercept of -2, so only a graph where the lines cross at (x, y) = (0, -2) is a viable choice.

In both cases, the inequality requires that values of y be "less than (or equal to)" those described by the line. Hence, the shading will be below both lines.

8 0

3 years ago