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Readme [11.4K]
3 years ago
8

Simplify the following algebraic expression -9-10[7x-3(3+10x)]

Mathematics
1 answer:
Citrus2011 [14]3 years ago
5 0
<span>-9 -10[7x -3(3 + 10x)]

= -9 - 10(7x - 9 - 30x)

= -9  - 10( -23x - 9)

= -9 + 230x + 90

= 230x + 81

Answer: </span>230x + 81<span>

</span>
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One counting number is 4 times great as a counting number.The product of the two number is 36.What is the sum of the two number
VARVARA [1.3K]

Answer:

The sum of the two numbers is 15

Step-by-step explanation:

Let the counting numbers be x and y.

Then we can write the following equations

x=4y.......1 (one is four times greater )

x(y)=36.....2 (the product of the two)

Putting equation 1 into equation 2, we get

4y(y)=36

{4y}^{2} = 36

Dividing through by 4,we get

{y}^{2} =  \frac{36}{4}

{y}^{2} = 9

Taking square root of both side, we obtain

y=3

Putting the value of y into equation , we get

x=4(3)=12

Hence the numbers are 3 and 12

Therefore the sum of the two numbers is 3+12=15

3 0
3 years ago
What is the sum of 9c+(8+3c)?
mixas84 [53]
<span>9c+(8+3c)      
9c+8+3c     (collect like terms)

9c+3c+8
12c+8

12c+8 is the answer.
im not sure if your teacher also wants the answer to be in simplest form so im going to do that below as well:

12c+8      (4*3=12 and 4*2=8. you can take out a 4 from those 2 numbers)

4(3c+2) (this is the simplest form of </span>9c+(8+3c)<span>)


</span>
6 0
3 years ago
Estimate the number of times an average person's heart beats in a lifetime. assume the average heart rate is 69 beats/min and a
rusak2 [61]
It would be approximately <span>2,719,980,000 beats in their entire lifetime.</span>
4 0
3 years ago
Read 2 more answers
A train leaves Philadelphia at 3 PM. The second train leaves the same city in the same direction at 9 PM. What is the speed of t
Musya8 [376]
This question is lacking vital information, such as when they got there.
6 0
3 years ago
What is the equation of the graph
AveGali [126]

Answer:

y = 2x^2 + 1

Step-by-step explanation:

The graph you see there is called a parabola. The general equation for the graph is as below

y = a*x^2 + b

To find the equation we need to find the constants a and b. The constant b is just how much we're lifting the parabola by. Notice it's lifted by 1 on the y axis.

To find a it's a little more tricky. Let's use the graph to find a value for a by plugging in values we know. We know that b is 1 from the previous step, and we know that when x=1, y=3. Let's use that!

3 = a * (1)^2 + 1\\2 = a

Awesome, we've found both values. And we can write the result.

y = 2x^2 + 1

I'll include a plotted graph with our equation just so you can verify it is indeed the same.

5 0
3 years ago
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