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Aleksandr-060686 [28]
3 years ago
8

%7D%20%7D%20" id="TexFormula1" title=" \frac{6a}{ - 1} \times \frac{7}{ - 9a {}^{2} } " alt=" \frac{6a}{ - 1} \times \frac{7}{ - 9a {}^{2} } " align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
lesya692 [45]3 years ago
4 0

Answer:

14/3a²

Step-by-step explanation:

-6a × 7/-9a³

(7 × 6a) / 9a³

42a / 9a³

14a / 3a³

14/3a²

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There are 26 third graders and 32 fourth graders going
erma4kov [3.2K]
26+32=58
58 divided by 10 is abt 5.something
The rest 8 students also needs to go, so it is 5+1=6 vans.
3 0
3 years ago
The sum of three numbers is 86. The third number is 4 times the first. The first number is 10 more than the second. What are the
Leona [35]

Answer:

The first number is 16

The second number is 6

The third number is 64

Step-by-step explanation:

The information from the word problem are;

The count of the numbers in the sum = 3 numbers

The value of the sum of the three numbers = 86

The value of the third number = 4 × The value of the first number

The value of the first number = 10 + The value of the second

Let 'x' represent the first number, let 'y' represent the second number and let 'z' represent the third number, we have;

x + y + z = 86...(1)

z = 4 × x...(2)

x = y + 10...(3)

From equation (3), we get;

x = y + 10

∴ y = x - 10...(4)

Substituting the value of <em>z</em> from equation (2) and the value of <em>y</em> from equation (4) in equation (1) gives;

x + y + z = 86

z = 4 × x = 4·x

y = x - 10

∴ x + y + z = x + (x - 10) + 4·x = 86

x + (x - 10) + 4·x = x + x - 10 + 4·x = 6·x - 10 = 86

6·x = 86 + 10 = 96

∴ x = 96/6 = 16

x = 16

From equation (2), we get;

z = 4 × x

∴ z = 4 × 16 = 64

z = 64

From equation (4), we get

y = x - 10

∴ y = 16 - 10 = 6

y = 6

Therefore; x = 16, y = 6, and z = 64

The numbers are 16, 6, and 64

8 0
3 years ago
5. Rebecca is 6 years older than three times Andrew's age. The sum of their ages is 18. How old is Rebecca?
anygoal [31]

Answer:

Rebecca is 18

Step-by-step explanation:

18/6-3=0

5 0
3 years ago
Olivia and her children went into a grocery store where they sell peaches for $2 each and mangos for $1 each. Olivia has $15 to
Naddik [55]
Here is an example of how to do it⬇️

Set variables for the quantities we want to find.

Let x = number of apples
Let y = number of oranges


Next, we use these variables to write equations that describes the whole story.

Since the total price is $7.75 and each type of fruit has their own price, we can say

0.40x + 0.35y = 7.55


The other equation will represent the total number of fruits bought all together, as Mark mentioned. Once you have those equations, you solve the system using substitution and elimination methods to solve for the variables x and y.

(If x represents the number of peaches purchased and y represents the number of mangos purchased)

Sorry if this isn’t good explanation but I tried sorry goodluck!
8 0
2 years ago
Evaluate the expression when a=−2 and c=−8.
Andreyy89

Answer:

|(−2)2(−8)|

<em>=32</em>

Step-by-step explanation:

Hope this helps! <3

8 0
3 years ago
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