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3 years ago

I need help with these questions plz help

Mathematics

1 answer:

stepladder [879]3 years ago

6 0

Answer:

1.A=bh/2

2A=bh

2A/b=h

answer check

2.f(x)=21-6x f(5)=21-6(5)

g(x)=2x/5-11 f(5)=21-30

21-6x=2x/5-11 f(5)=-9

21=32x/5-11 g(5)=2(5)/5-11

(5)32=32x/5(5) g(5)= 10/5-11

160=32x g(5)=2-11

5=x g(5)=-9

3. f(7)=3(7)-7

f(7)= 21-7

f(7)= 14

Step-by-step explanation:

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4 years ago

A hot air balloon festival, Mohammed’s balloon is at 40 feet and rises at a rate of 10 ft./min. dana’s balloon is at a height of

nekit [7.7K]

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5 minutes
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Step-by-step explanation:

After some number of minutes m, Mohammed's altitude will be ...

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and Dana's altitude will be ...

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3 years ago

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Step-by-step explanation:

7 0

4 years ago

1/3 rd part of the length of a bamboo is coloured in red and 1/5th part of it is coloured green and the remaing is 14m is colour

aksik [14]

$\bold{\huge{\blue{\underline{ Solution }}}}$

$\bold{\underline{ Given :- }}$

1/3rd part of the length of a bamboo is coloured with red and 1/5th part of it is coloured with green and the remaining is 14m is coloured with yellow.

$\bold{\underline{ To \: Find :- }}$

We have to find the total length of the bamboo

$\bold{\underline{ Let's \: Begin :- }}$

Let the total length of bamboo be x

According to the question, 

$\sf{\dfrac{ 1}{3}}{\sf{x +}}{\sf{\dfrac{ 1}{5}}}{\sf{x + 14 = x }}$

$\sf{\dfrac{ 1}{3}}{\sf{x + }}{\sf{\dfrac{1}{5}}}{\sf{x = x - 14 }}$

$\sf{\dfrac{5x + 3x}{15}}{\sf{ = x - 14 }}$

$\sf{ 5x + 3x = 15( x - 14 )}$

$\sf{ 8x = 15x - 210 }$

$\sf{ 210 = 15x - 8x}$

$\sf{ 7x = 210 }$

$\sf{ x = }{\sf{\dfrac{ 210}{7}}}$

$\sf{\red{x = 30\: m}}$

Hence, The total length of the bamboo is 30m.

6 0

2 years ago