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Solnce55 [7]
3 years ago
12

Don't get #15. Cam someone help me

Mathematics
1 answer:
WITCHER [35]3 years ago
6 0
15) Function notation:
f(x) = x² - 5x +8

16) f(2) , means you have to replace x by 2
f(2) = 2² - 5(2) + 8 = 4-10+8  and f(2) = 2

17) f(x) = 8 , means : 8 = x² - 5x +8

Simplify x² - 5x = 0
Factorize x² - 5x = 0 → x(x - 5) = 0, then the valueS of x are:
x = 0   and x = 5

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Someone help me and my daughter we are stuck on this problem
kozerog [31]

Answer:

-3072

Step-by-step explanation:

ar^(n-1)

a is the first term.

r is the common ratio.

3(-4)^(6-1)

3(-4)^5

3(-1024)

= -3072

The 6th term of the geometric sequence is -3072.

6 0
3 years ago
Read 2 more answers
Q # 17. please help me with this
vredina [299]
Hi there!

Dimensions of rectangular room :-

• Length = 109 inches
• Breadth = 103 inches

Dimensions of square tiles :-

• Each side = 3 inches

It's known :-

No. of tiles = Area of rectangular room / Area of tile

No. of tiles = \dfrac {109 × 103}{3}

No. of tiles = \dfrac {11227}{9}

No. of tiles = 1,247

Hence,
Th' number of tiles required for the job is 1,247

~ Hope it helps!
3 0
3 years ago
What is 18 & 20 & can you show work please??
irina1246 [14]
18. Make the values have the same denominators.

4 2/3(8/8)= 112/24
5 3/8 (3/3)= 129/24

Add the values

112/24+129/24= 241/24

Simplify the answer

241/24= 10 1/24

The answer for question 10 1/24 ounces.


20. Multiply 1 1/4 by 5. (There are 5 days from Monday through Friday)

1.25(5)= 6 1/4

The answer to question 20 is 6 1/4.


Hope this helps!




8 0
4 years ago
Solve the system of linear equations: 1/5 x + 1/8 y = 1 1/2 x − 1/3 y = 1
Alchen [17]

Answer:

x = 75 and y = -72

Step-by-step explanation:

It is given that,

1/5 x + 1/8 y = 1   ------(1)

1/2 x − 1/3 y = 1  -------(2)

<u>To find the solutions of the system of equations</u>

Step 1: eq(1) * 5 ⇒

x + 5/8y = 5  ----(3)

Step 2:  eq(2) * 2 ⇒

x - 2/3y = 2  -----(4)

Step 3: eq(3) - eq(4) ⇒

x + 5/8y = 5  ----(3)

<u>x - 2/3y = 2  -</u>----(4)

0 +(5/8 - 2/3)y = 3

 -1/24 y = 3

y = -24*3 = -72

Step 4: Substitute the value of y in eq(1)

1/5 x + 1/8 y = 1   ------(1)

1/5 x + 1/8 (-72) = 1   ------(1)

1/5 x  - 24 = 1

1/5 x = 25

x = 5*25 = 75

Therefor x = 75 and y = -72

4 0
3 years ago
Read 2 more answers
Juanita begins to factor an expression as shown. x2+3x−18=(x+)(x−) What numbers should be placed in the boxes from left to right
stich3 [128]

Answer:

Option A is the correct answer.

Step-by-step explanation:

Here we need to factorize  x²+3x−18

The coefficient of x is 3 and the constant is -18

Which means

           The sum of factors is 3

           The product of factors is -18

The factors satisfying are  6 and -3

Here the factors are given in the type (x+)(x−)

     So the value after plus is 6 and value after - is 3

Option A is the correct answer.            

6 0
3 years ago
Read 2 more answers
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