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4 years ago

If 9 is subtracted from a certain number and the difference is divided by 3, the result is 1 more than

Mathematics

1 answer:

Butoxors [25]4 years ago

4 0

Answer:

Let the number be x.

(x-9)/3= (x/7)+1

(x-9)/3= (x+7)/7

Cross multiplying

7x-63= 3x+21

4x= 84

x= 42

Hope this will help :-)

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Answer this question please

galben [10]

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4 years ago

Which is an equation of the line containing the points (4,6) and (6,10) in standard form?

algol13

Answer C is correct.

3 0

3 years ago

An arithmetic series contains 20 numbers. The first number is 102. The last number is 159. Which expression represents the sum o

Whitepunk [10]

Answer:

Option B

Step-by-step explanation:

we know that

The sum of an arithmetic series is equal to

S=n(a1+an)/2

where

a1 is the first term

an is the last term

n is the number of terms

In this problem we have

n=20

a1=102

an=159

substitute the values in the formula

S=20(102+159)/2

3 0

3 years ago

The CHS Baseball team was on the field and the batter popped the ball up. The equation b(x)=80t-16t^2+3.5 represents the height

Aleksandr [31]

Answer:

t = 5 seconds

Step-by-step explanation:

We must solve the equation of movement of the ball as a function of time in seconds.

We must find how many seconds it takes until the ball touches the ground. When the ball touches the ground, the height b (t) = 0

Then we equate the equation to zero and solve for t.

$80t-16t ^ 2 + 3.5 = 0$

Use the quadratic formula.

Where

$a = -16\\\\b = 80\\\\c = 3.5$

$t = \frac{-b \±\sqrt{b^2-4ac}}{2a}\\\\\\t_1 = \frac{-(80)-\sqrt{(80)^2-4(-16)(3.5)}}{2(-16)}\\\\t_1= 5.04\ s\\-------------------------\\t_2 =\frac{-(80)+\sqrt{(80)^2-4(-16)(3.5)}}{2(-16)}\\\\t_2=-0.0434\ s$

We take the positive solution

t = 5 seconds

7 0

3 years ago

How to calculate area when you are given volume of 182m3 and height of 2.8m

Elza [17]

Hey there!

We simply have to do 182/2.8, and you will get the area (65m^2).

We know that the formula for area is length x width, and the formula for volume is length x width x height. In the volume formula, we can see it can also be area x height to get volume. So, we know that area x height = volume, right? And in this equation, we are given volume and height. If V = ha, with V = volume; h = height; a = area, we can divide "h" on both sides, and we get V/h = a, or volume divided by height is area. To solve for the above equation, we can plug the numbers in the formula: 182/2.8 = a, or 65 = a.

Hope this helps! Have an amazing day, and remember, you've got this!

4 0

3 years ago