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3 years ago

6

Aaron scored 452.65 marks out of 600 in the final examination. How many marks did he lose?

2 answers:

lana [24]3 years ago

7 0

Answer:

He lost 147.35 marks

Step-by-step explanation:

Take the total marks and subtract the marks he got to find the marks he lost

600-452.65= 147.35

Alik [6]3 years ago

5 0

600-452.65= 147.35

he lost 147.35 marks

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Circle T has diameters RP and QS. The measure of ∠RTQ is 12° less than the measure of ∠RTS. What is the measure of Arc Q P? 78°

Igoryamba

Answer:

RTQ+RTS=180

RTQ+12=RTS

2RTQ+12=180

RTQ=84

RTS=96

QTP=RTS=QP=96

6 0

3 years ago

You have 600 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river

inn [45]

Answer:

The length and width of plot is $L=300\:ft$ , $W=150\:ft$

Largest area of the plot is $A=45000 ft^{2}$

Step-by-step explanation:

Assume width as x and length as y. Given that length of fencing is 600 feet and fencing is enclosed on 3 sides. So perimeter is given as,

Perimeter = width + length + width

Substituting the value,

$600=x+y+x$

$600= 2x+y$ ….1

Now area of fence of rectangular box is given as follows,

$A=xy$ ….2

Solving equation 1 for y, subtracting 2x from both sides,

$600-2x= y$

Substituting the value in equation 2,

$A=x\left (600-2x \right )$

Simplifying

$A=600x-2x^{2}$

Rewriting,

$A=-2x^{2}+600x$

Above equation looks like quadratic equation $f\left ( x \right )=ax^{2}+bx+c$ whose graph looks like parabola.

Comparing equation f(x) and A values of a, b and c are, $a=-2,b=600$ and $c=0$ .

Now maximum of $f\left ( x \right )$ occurs at vertex.

The x coordinate of the vertex is given as $-\dfrac{b}{2a}$

Substituting the values,

$x=-\dfrac{600}{2\left (-2 \right )}$

Simplifying,

$x=\dfrac{600}{4}$

$x=150$

So width of plot is 150 feet.

Now to calculate value of length by using equation 1,

$600= 2x+y$

Substituting the values,

$600= 2\left (150 \right )+y$

$600= 300+y$

Subtracting 300 from both sides,

$300= y$

So length of plot is 300 ft.

The y coordinate of the vertex is given as $y=f\left ( -\dfrac{b}{2a} \right )$ which also means, $y=f\left ( 150 \right )$

$\therefore A=-2\left (150 \right )^{2}+600\left (150 \right )$

Simplifying,

$\therefore A=-2\left (22500 \right )^{2}+600\left (150 \right )$

$\therefore A=-45000+90000$

$\therefore A=45000$

So, area of the plot will be $A=45000 ft^{2}$

7 0

3 years ago

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umka21 [38]

Answer:

i had this in rsm a long time ago, i think the answer(if it's an equation) should be:

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yeah sorry i forgot scream scream

Step-by-step explanation:

3 0

3 years ago

Sjsjjsnsnsjdjdjkdkdkdkdkddkdidkdkdkkdkxkxkxkxkkxmxnxmxmxkmxkxkxkkxkx

almond37 [142]

Sknsmakskdnndjaixjnejwjc :)

5 0

3 years ago

Read 2 more answers

Does anyone know the answer to this?

Maslowich

I only found b I’m still working on a anyways.

Answer:
339

Explain: 339+39= 378 you can divide 378 by 9 which is 42, 42 subtracted by 3 is 39

3 0

3 years ago