4 years ago

I need help and plz show your work

Mathematics

1 answer:

nasty-shy [4]4 years ago

8 0

Answer:

Step-by-step explanation:

the question says that distance is directly proportional to time walked,

.: s alpha t

s = kt [k for proportionality]

A/Q

1.5 = k × 13.5

k = 1.5/13.5

k = 1/9

IInd

2=1/9 × t

t= 2×9=18

IIIrd

4.5=1/9 × t

t= 4.5×9=40.5

t=40.5

IVth

5=1/9 × t

t=5×9

t=45

s. t

1.5 13.5

2 18

4.5 40.5

5 45

You might be interested in

What do N and M equal?

AlexFokin [52]

$\bf ((5^{-2})(9^5))^{-6}\implies ((5^{-2\cdot -6})(9^{5\cdot -6}))\implies 5^{\stackrel{\stackrel{n}{\downarrow }}{12}}\times 9^{\stackrel{\stackrel{m}{\downarrow }}{-30}}$

3 0

3 years ago

Trong mặt phẳng tọa độ Oxy , cho vectơ a = ( -3;4) . Độ dài vectơ a bằng bao nhiêu

LenaWriter [7]

Answer:

Step-by-step explanation:

Độ dài vecto a= căn bậc hai của (-3)*(-3)+4*4=5

8 0

3 years ago

I NEED HELP PLEASE I WILL MARK BRAINLIST<br><br> The question is in the screenshot

Ivan

The answer is unreasonable because the value of x is between 2 and 3.The error is : she did not introducing logs in solving the equation.

Step-by-step explanation:

The question is $7^x=95$

Here answers is unreasonable because, she can test with powers of seven like;

7²=49

7³=343

So this means the value of x lies between 2 and 3, so here answer 11.71 is unreasonable

b) In this case, to solve the equation, introduce logs both sides

$7^x=95$

$log7^x=log95\\\\\\xlog7=log95\\\\\\x=\frac{log95}{log7} \\\\\\x=2.340$

Learn More

Indices :brainly.com/question/1660321

Keywords :Equation, error

#LearnwithBrainly

4 0

3 years ago

The center of a circle is at (−3, 1) and its radius is 9. What is the equation of the circle?

jek_recluse [69]

If a circle has center (a,b) and radius r, the equation is

$(x-a)^2+(y-b)^2=r^2$

So, you have

$(x+3)^2+(y-1)^2=81$

7 0

3 years ago

A coat discount 40% off it's regular price. Which value is equivalent to 40%

Cerrena [4.2K]

0.4 ,2/5 as a fraction, and a ratio 2:5 !

5 0

4 years ago