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2 years ago

Write an equation for the following and then solve. Twice a number is 8. Find the number.

Mathematics

1 answer:

Yakvenalex [24]2 years ago

6 0

Answer:

The number u are looking for is 4

Step-by-step explanation:

Let X be the unknown number that we want to find.

So it becomes,

2X = 8

move 2 to the other side, so it becomes a divide

X = 8/2

X = 4

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How to do questions 19 and 20

Alexeev081 [22]

Answer & Step-by-step explanation:

Using the information given in the question we can form the following 3 equations (in the order of the first 3 sentences)

w = 2h (twice the price)

t = h - 4 ($4 less)

3w + 2h + 5t = 136 (total purchasing and cost)

We can solve all 3 equations for h first, by substituting the first two equations, into the third equations w and t

3(2h) + 2h + 5(h-4) = 136

Simplify

6h + 2h + 5h - 20 = 136

13h = 136 + 20

13h = 156

h = 156/13

h = $12

Using this information, we can solve for w and t

w = 2h

w = 2(12)

w = $24

And finally

t = h - 4

t = 12 - 4

t = $8

4 0

2 years ago

Hannah completed 40 problems in 32 minutes.<br> I have to put it in a unit rate pls help

il63 [147K]

Answer: 1.25 problems/min

32 minutes --> 40 problems

1 minute --> 40/32

--> 1.25

5 0

2 years ago

Use the numbers from the original example: $1,000 invested at a 2% interest rate compounded n times per year. Compare the change

damaskus [11]

Given:
P₀ = $1000, the principal
r = 2% = 0.02, the APR

Let the duration be 1 year
n = number of compounding intervals per year.
The value after 1 year is
$A=P_{0}(1 + \frac{r}{n} )^{nt} = 1000(1+ \frac{0.02}{n})^{n}$

The following table shows the results obtained from the calculator.

n A
------ ------------------
1 1020.00000
4 1020.15050
12 1020.18436
52 1020.19742
365 1020.20078

4 0

2 years ago

a local hamburger shop sold a combined total of 572 hamburgers and cheeseburgers on Thursday. there were 72 more cheeseburgers s

Helga [31]

Answer: 250 hamburgers

Step-by-step explanation: x= hamburgers

If there are 72 more cheeseburgers than hamburgers there are:

x+72

The number of cheeseburgers and hamburgers=572 so:

572= x+72+x

Then solve

572=x+72+x

572=2x+72

-72 -72

———————

500=2x

500/2=2x/2

250=x

7 0

3 years ago

13. Find the value of x and y

lidiya [134]

Answer:

I don't think your supposed to find the value of x and y but I think you need to combine like terms.

5 0

3 years ago

Read 2 more answers