MATHEMATICS MIDDLE SCHOOL

The actual length of c in the triangle shown is 15 cm. Use the scale drawing of the triangle to find the actual length of side a.

Answers

Answer 1

Answer:

Answer: 9.375 cm

Step-by-step explanation:

From the given picture, it can be seen that the measure of side 'c' in triangle = 1.92 cm

The actual length of 'c' in the triangle = 15 cm.

The scale factor = $k=\frac{\text{ actual length of c}}{\text{length of c in figure}}$

$k=(15)/(1.92)=7.8125$

Now, the length of side 'a' = 1.2 cm

The actual length of side 'a' $k*1.2=7.8125*1.2=9.375\text{ cm}$

Answer 2

Answer: We can solve this problem by the rule of three:

1.5 cm---------------15 cm
1.2 cm--------------- x

x=(1.2 cm*15 cm) / 1.5 cm=12 cm.

answer. a=12 cm.

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Answers

the answer to that is one fifth

What is the value of the expression 6+18÷3×4

Answers

Hi! Ok so you use PEMDAS to figure these out.
So first we can cancel out parenthesis and exponents since there are none in this equation.
Now we do multiply and divide from left to right.
So first 18/3=6
So 6+6*4
Now we do 6*4=24
Now add and subtract
Then 6+24=30
So your answer is 30

it would be 30 cuz of the PEMDS
18 ÷ 3 =6
3 × 4 = 24
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Points a and b lie on the graph of the equation y=5.2x What r thr y coordinates

Point a (-6,___)

Point b (7,___)

And hey if you have time I have two other probs that I need help on just click on my profile thanks !?!

Answers

Do you have the rest of the equation? If you can find out what (x) is, the rest will be easy. All I can get from it is (y)= 5.2 times the (x) amount

Please do me a favor and answer this ASAP! Due before midnight! 9:25pm where I am at.

Answers

Step-by-step explanation:

The tuxedo price is blurry so I can't see it.

but you would need to multiply the addutional days by the price for the additional day.

and for the total price you would need to add the price before the additional days to the price for the additional days for how much he needs to pay.

p-price

p-priced×p=price for additional days

Find the arc length of the semicircle

Answers

Answer:

6pi

Step-by-step explanation:

hop it helps

Answer:

18.8496 units (rounded o1ff to four decimal places)

Step-by-step explanation:

Arc length = 2 × π × r × $(central-angle)/(360)$

r (radius) = 12 units ÷ 2 = 6 units

Central angle = 180°

For our semicircle, the arc length = 2 × π × 6 × $(180)/(360)$ = 18.8495559215 units

Or 18.8496 units (rounded o1ff to four decimal places)

2x^2 + x – 1 = 9
Does it have any real solutions? If so what are they?

Answers

$2x^2 + x - 1 = 9 \n \n2x^2 + x -1 - 9=0\n \n2x^2 + x-5x +5x -10 = 0 \n \n 2x^2 -4x +5x -10 = 0\n \n 2x(x -2) +5(x -2) = 0\n \n(x-2)(2x+5)=0\n \nx-2 =0 \ \ or \ \ 2x+5 =0 \n \nx=2 \ \ or \ \ 2x =-5 \n \nx=2 \ \ or \ \ x =-(5)/(2) \n \nAnswer : \ x=2 \ \ or \ \ x=-(5)/(2)$

2x^2 + x – 1 = 9
2x^2+x-1-9=0
2x^2+x-10=0
a=2
b=1
c=-10

Delta=b^2-4ac
Delta=1-4*2*(-10)
delta=1+80
delta=81
rad 81=9

x1=-b-rad 81 /2a
x1=-1-9/2*2
x1=-10/4
x1=-5/2

x2=-b+rad 81 /2a
x2=-1+9/2*2
x2=8/4
x2=2

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