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3 years ago

11

What number makes 3 and 71 divisible by 9?

1 answer:

Snezhnost [94]3 years ago

4 0

3 only
<span>7 only </span>
<span>1 only </span>
<span>1, 4, and 7 </span>
<span>do you mean which digit is added to 371 so that it is divisible by 3 </span>
<span>test for 3, sum of digits divisible by 3 </span>
<span>3 + 7 + 1 = 11 </span>
<span>if you add 3, 11 + 3 = 14 not divisible by 3 </span>
<span>if you add 7, 11+ 7 = 18 divisible by 3 </span>
<span>if you add 1, 11+ 1 = 12 divisible by 3 </span>
<span>if you add 1, 4, 7 divisible by 3 </span>

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3.000x10^2+6.000x10^5

hjlf

600300 or 6.003x10^5

3.000= 3 , 6.000= 6

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3 years ago

Solve the equation x+0.7=1-0.2x In two different ways

timama [110]

Add 0.2x to both sides
1.2x+0.7= 1
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x=.3/1.2
x=.25

option #2
subtract .7 on both sides

x=1-.7-.2x
x=.3-.2x
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3 years ago

On monday it took 5 builders to 3 1/2 hours to build a wall

zubka84 [21]

Answer: £ 81.38

Step-by-step explanation:

Given: On Monday,

5 builders took $3\dfrac{1}{2}$ hours ( i.e. $\dfrac{7}{2}$ hours ) to build a wall.

On Tuesday, only 2 builders were available.

As workers are inversely proportional to the time if the job remains constant.

Inverse variation equation : $x_1y_1=x_2y_2$

Let x be the time taken by 2 builders, then

$2\times x =5\times \dfrac{7}{2}$

$\Rightarrow\ x=\dfrac{35}{2}\times\dfrac{1}{2}=\dfrac{35}{4}=8.75$

So, 2 builders will take 8.75 hours.

Each paid £9.30 for each hour.

Then, each builder will be paid for the work completed on Tuesday = £9.30 x 8.75

≈ £ 81.38

Hence, each builder will be paid £ 81.38 for the work completed on Tuesday .

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3 years ago

Paul [167]

Answer: D. 3/2

Step-by-step explanation:

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3 years ago

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Clear<br>The perimeter of a regular octagon is 88 mm. How long is each side?

Colt1911 [192]

Answer:

11 mm

Step-by-step explanation:

An octagon has 8 sides. This mean that we do 88 divided by 8 to get the length of each side which is 11 mm.

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3 years ago