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2 years ago

Can somebody plz help answer these word prob questions plz thanks! (Grade7math( btw :)

Mathematics

1 answer:

Illusion [34]2 years ago

4 0

Answer:

3:1

8:5

Step-by-step explanation:

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What is the value of the function y= 3x – 1 when x= -1 ?<br> -8<br> -4<br> 02<br> 6

netineya [11]

Answer:

-4

Step-by-step explanation:

3(-1)-1 PEMDAS

-3-1=-4

7 0

3 years ago

Meg surveyed some students at her school about their favorite professional sports. Of the students surveyed, 2 said football was

elixir [45]

Answer:

$\frac{1}{5}$

Step-by-step explanation:

Assuming a total of ten students were asked, $\frac{2}{10}$ chose football and $\frac{8}{10}$ chose other sports. $\frac{2}{10}$ simplified is $\frac{1}{5}$ , so that's the experimental chance that the next student favors football.

4 0

2 years ago

Read 2 more answers

F(x) = x2 – 3x – 2 is shifted 4 units left. The result is g(x). What is g(x)?

Ray Of Light [21]

$\bf \qquad \qquad \qquad \qquad \textit{function transformations}
\\ \quad \\\\

\begin{array}{rllll} 
% left side templates
f(x)=&{{ A}}({{ B}}x+{{ C}})+{{ D}}
\\ \quad \\
y=&{{ A}}({{ B}}x+{{ C}})+{{ D}}
\\ \quad \\
f(x)=&{{ A}}\sqrt{{{ B}}x+{{ C}}}+{{ D}}
\\ \quad \\
f(x)=&{{ A}}(\mathbb{R})^{{{ B}}x+{{ C}}}+{{ D}}
\\ \quad \\
f(x)=&{{ A}} sin\left({{ B }}x+{{ C}} \right)+{{ D}}
\end{array}$

$\bf \begin{array}{llll}
% right side info
\bullet \textit{ stretches or shrinks horizontally by } {{ A}}\cdot {{ B}}\\\\
\bullet \textit{ flips it upside-down if }{{ A}}\textit{ is negative}
\\\\
\bullet \textit{ horizontal shift by }\frac{{{ C}}}{{{ B}}}\\
\qquad if\ \frac{{{ C}}}{{{ B}}}\textit{ is negative, to the right}\\\\
\qquad if\ \frac{{{ C}}}{{{ B}}}\textit{ is positive, to the left}\\\\
\end{array}$

$\bf \begin{array}{llll}


\bullet \textit{ vertical shift by }{{ D}}\\
\qquad if\ {{ D}}\textit{ is negative, downwards}\\\\
\qquad if\ {{ D}}\textit{ is positive, upwards}\\\\
\bullet \textit{ period of }\frac{2\pi }{{{ B}}}
\end{array}$

now... your expression is not in vertex form, that's ok... to do a horizontal shift to the left by 4 units, we can simply, add the C and B component to the "x" variable, C=4, B =1, that way the horizontal shift of C/B or 4/1 is just +4, giving us a horizontal shift to the left

$\bf f(x)=x^2-3x-2\impliedby \textit{let's change that for }f(1x+4)
\\\\\\
f(1x+4)=(1x+4)^2-3(1x+4)-2
\\\\\\
f(x+4)=x^2+8x+16-3x-12-2
\\\\\\
f(x+4)=x^2-5x+2\impliedby g(x)$

8 0

3 years ago

Read 2 more answers

Which is the value of the expression when x=-2 and y =-3

a_sh-v [17]

Answer:

-720

Step-by-step explanation:

10x^3y^2 If x = -2 and y = -3

10 * (-2^3) * (-3^2)

10 * (-8) * (9) = -720

6 0

3 years ago

Read 2 more answers

The equations are given below.

amid [387]

Answer:

neither

Step-by-step explanation:

they are parallel when they have the same slope and perpendicular when the slope is completely different

5 0

2 years ago