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Len [333]
3 years ago
15

Linda made a scale drawing of her classroom for her math project. She used a scale of 1 cm = 2.5 ft. If the length of her classr

oom on the drawing measured 20 cm, what is the actual length of her classroom?
Mathematics
1 answer:
Temka [501]3 years ago
8 0

Answer:

737

Step-by-step expllol

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5(x+4)> 2x-7 solve the inequality
galina1969 [7]

Answer:

-9>x

Step-by-step explanation:

5(x+4)>2x-7

5x+20>2x-7

5x+20>2x-7

<u>     +7           +7</u>

5x+27>2x

        ↓

5x+27>2x

<u>-5x        -5x</u>

27>-3x

      ↓

<u>27>-3x </u>

-3     -3

= -9>x

3 0
3 years ago
Can someone explain this differentiation question to me? I can differentiate but then I'm not sure what I am doing
weeeeeb [17]

note that gradient = \frac{dy}{dx} at x = a

calculate \frac{dy}{dx} for each pair of functions and compare gradient

(a)

\frac{dy}{dx} = 2x and \frac{dy}{dx} = - 1

at x = 4 : gradient = 8 and - 1 : 8 > - 1

(b)

\frac{dy}{dx} = 2x + 3 and \frac{dy}{dx} = - 2

at x = 2 : gradient = 7 and - 2 and 7 > - 2

(c)

\frac{dy}{dx} = 4x + 13 and \frac{dy}{dx} = 2

at x = - 7 : gradient = - 15 and 2 and 2 > - 15

(d)

\frac{dy}{dx} = 6x - 5 and \frac{dy}{dx} = 2x - 2

at x = - 1 : gradient = - 11 and - 4 and - 4 > - 11

(e)

y = √x = x^{\frac{1}{2} }

\frac{dy}{dx} = 1/(2√x) and \frac{dy}{dx} = 2

at x = 9 : gradient = \frac{1}{6} and 2 and 2 > \frac{1}{6}


4 0
3 years ago
First answer gets brain
Alex787 [66]
3 \frac{4}{7}m =8 \frac{1}{3} \\ \\\frac{25}{7}m=\frac{25}{3} \\  \\ m= \frac{25}{3}: \frac{25}{7}= \frac{25}{3}* \frac{7}{25}= \frac{7}{3}=2 \frac{1}{3}
4 0
3 years ago
Read 2 more answers
What is 75.65 rounded to the nearest whole number?​
Nitella [24]

Answer:

76

Step-by-step explanation:

if the number after period is bigger than 5.. then it's about the number higher than the number befor the period

sorry if u have trouble understanding what I said I'm really not good at explaining:)

5 0
2 years ago
Read 2 more answers
The two triangles shown are similar. Find the value of d/c
Stolb23 [73]

Answer:

D. None of the above

Step-by-step explanation:

\frac{c}{9}  =  \frac{d}{7.5} \\  \frac{d}{c}  =  \frac{7.5}{9}

P.S. hope it helped. If you have any questions, I'll be glad to answer them❤

7 0
3 years ago
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