4 years ago

(Please provide an explanation as well if you can, I'm pretty confused on how you would find this out on any other problems)

Mathematics

1 answer:

Sedaia [141]4 years ago

6 0

Answer:

88%.

Step-by-step explanation:

Total scores = 85 * 50 = 4250.

Take the 20 marks the 2 students scored away gives us 4230,

To find the new mean we divide by 48:

4230 / 48

= 88%.

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The annual expenditure of the US federal government is approximately 4 44 trillion dollars. If a one dollar bill is 0 . 0 0 0 1

kaheart [24]

Answer:

<em>A stack of 4 trillion one dollar bills will be $4\times 10^8$ meters.</em>

Step-by-step explanation:

The annual expenditure of the US federal government is approximately 4 trillion dollars.

We know, 1 trillion dollars = 10¹² dollars.

So, 4 trillion dollars $=(4\times 10^1^2)$ dollars.

Each one dollar bill is 0.0001 meters thick.

So, the total height of the stack of 4 trillion one dollar bills will be.....

$[0.0001\times(4\times 10^1^2)]meters\\ \\ =[10^-^4\times(4\times 10^1^2)]meters\\ \\ =(4\times 10^8) meters$

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3 years ago

A rectangle is 3 times as long as it is wide. The perimeter is 120 cm. Find the dimensions of the rectangle. Round to the neares

Ivenika [448]

The rectangle is 15cm by 45cm
2(3x)+2(x)=120
6x+2x=120
8x=120
X=15
3(15)=45

6 0

3 years ago

Carlos just took a 40 question math test. He scored a 75%. How many questions did he get correct?

sergiy2304 [10]

Answer:

He missed 10 questions and got 30 right

Step-by-step explanation:

So we could do 0.75 times 40 and we would get 30

So he got 30 questions right which isn't too bad

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3 years ago

(3x + 7)5<br> Simply the expression

babunello [35]

Answer:

15x+35

Step-by-step explanation:

$(3x + 7)5$

Use 5 to open the bracket

$3x \times 5 = 15x \\ 7 \times 5 = 35$

$15x + 35$

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3 years ago

Read 2 more answers

Answer this and ill give you all my points if you answer them all.

sertanlavr [38]

Answer: its not clear

Step-by-step explanation:

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3 years ago