All categories

3 years ago

Here are six number cards.

Mathematics

1 answer:

Helen [10]3 years ago

6 0

Answer:

See explanation

Step-by-step explanation:

The first pair is (-4 and 8)

Because if we add those two values, i. e., 8 + (-4), we will get 4.

Again, the second pair is (-2 and 6). In that case, if we also add those two values, that is, 6 + (-2), we will get 4.

Finally, the third pair is (-1 and 5). Again, we will add the two values. 5 + (-1) = 4.

In each case, we can see that the addition of each pair is 4.Therefore, the total is similar in each pair after arranging the cards.

You might be interested in

What the answer is to question number 4

cestrela7 [59]

Hey there!
The answer is D. 1/5
An explanation is in the attached image below.
Hope this helps!

3 0

2 years ago

Marcie bought a total of 20 used books and cds during a yard sale for a total of 54.50$. of books cost 1.50$ each and cds 5$ eac

melomori [17]

Let numbers of books be 'b' and numbers of CDs be 'c'

We can set up two equations:
Equation [1] ⇒ $b+c=20$
Equation [2] ⇒ $1.50b+5c=54.50$

We are solving for the number of books and the number of CDs bought

When we have two equations in terms of two different variables; $b$ and $c$ , that we need to solve, then this becomes a simultaneous equation problem.

First, rearrange Equation [1] to make either $b$ or $c$ the subject:
$b+c=20$
$b=20-c$

Then we substitute $b=20-c$ into Equation [2]
$1.50b+5c=54.50$
$1.50(20-c)+5c=54.50$
$30-1.50c+5c=54.50$
$5c-1.5c=54.50-30$
$3.5c=24.50$
$c=7$

Now we know the value of $c$ which is $c=7$ , substitute this value into $b=20-c$ we have $b=20-7=13$

Answer:
Numbers of books = 13
Numbers of CDs = 7

5 0

3 years ago

54:46

Slav-nsk [51]

The answer is 3n-4 because 4 is being subtracted

6 0

3 years ago

A colony contains 1500 bacteria. The population increases at a rate of 115% each hour. If x represents the number of hours elaps

Burka [1]

Answer:Answer:

Option (c) is correct.

function representing the increase of bacteria every hour x,

Step-by-step explanation:

Given : A colony contains 1500 bacteria. The population increases at a rate of 115% each hour.

we have to find the function that represents the given scenario.

Let x represents the number of hours elapsed.

Given A colony contains 1500 bacteria

and number of bacteria is increasing at a rate of 115% each hour.

Using formula for Compound interest , we have,

Where A is amount

T is time period

R is rate of interest

Here, P = 1500

T = x hours

R = 115%

Let f(x) be the function representing the increase of bacteria every hour.

Substitute, we have,

Simplify, we get,

Thus, function representing the increase of bacteria every hour x,

5 0

2 years ago

Solve for x:7x + 3 = 17

solong [7]

X would have to equal 2 because when you multiply that by 7 you get 14 then add 3 and you get 17

5 0

3 years ago

Read 2 more answers