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olya-2409 [2.1K]
4 years ago
5

Perform the operation below using a number line. -7-(-8). ASAP. pleeease help.​

Mathematics
1 answer:
Aliun [14]4 years ago
4 0

Answer:

1

Step-by-step explanation:

Calculation steps:

-7-(-8) =                  ⇒ two negatives cancel and change to positive

- 7 + 8 =                  ⇒ 8-7 = 1

1                              ⇒ answer

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Solve the system of equations.
nikdorinn [45]

Answer:

Step-by-step explanation:

x - y = 34

x + y = 212

-------------------add

2x = 246

x = 246/2

x = 123 <=== 123 domestic

x + y = 212

123 + y = 212

y = 212 - 123

y = 89 <===== 89 foreign

8 0
3 years ago
Read 2 more answers
How many ways can six of the letters of the word ALGORITHM be selected 8. How many ways can the letters of the word ALGORITHM be
SCORPION-xisa [38]
<h2>Answer with explanation:</h2>

The number of letters in word "ALGORITHM" = 9

The number of combinations to select r things from n things is given by :-

C(n,r)=\dfrac{n!}{r!(n-r)!}

Now, the number of combinations to select 6 letters from 9 letters will be :-

C(9,8)=\dfrac{9!}{6!(9-6)!}=\dfrac{9\times8\times7\times6!}{6!\times3!}=84

Thus , the number of ways can six of the letters of the word ALGORITHM=84

The number of ways to arrange n things in a row :n!

So, the number of ways can the letters of the word ALGORITHM be arranged in a be seated together in the row :-

9!=362880

If GOR comes together, then we consider it as one letter,  then the total number of letters will be = 1+6=7

Number of ways to arrange 9 letters if "GOR" comes together :-

7!=5040

Thus, the number of ways to arrange 9 letters if "GOR" comes together=5040

3 0
3 years ago
Which of the following lists all of the positive factors of 18?
babymother [125]

The square root of 18 is 4.2426, rounded down to the closest whole number is 4. Testing the integer values 1 through 4 for division into 18 with a 0 remainder we get these factor pairs: (1 and 18), (2 and 9), (3 and 6). The factors of 18 are 1, 2, 3, 6, 9, 18.

Step-by-step explanation:

4 0
3 years ago
What number gives a result of -4 when 9 is subtracted from the quotient of the number and 5?
Vera_Pavlovna [14]
Answer:

25

Step by step:

1. prepare the equation

-4 = x/5 - 9

2. add 9 to both sides

-4 = x/5 - 9
+9 +9
5 = x/5

3. multiply both sides by 5

5 = x/5
(5) (5)
25 = x

4. x=25

Hope this helps
6 0
3 years ago
The average value of all the pennies, nickels, dimes, and quarters in Paula's purse is 20 cents. If she had one more quarter, th
sveta [45]

Answer:

Step-by-step explanation:

The average value of all the pennies, nickels, dimes, and quarters in Paula's purse is 20 cents. If she had one more quarter, the average value would be 21 cents. How many dimes does she have in her purse

7 0
2 years ago
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