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astraxan [27]
3 years ago
5

I need help fast will give brainliest!!!

Mathematics
1 answer:
givi [52]3 years ago
6 0

Answer:

C and D

Step-by-step explanation:

the answers are C and D.

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How many solutions -3x+9-2x=-12-5X
vesna_86 [32]

Answer:

0

Step-by-step explanation:

5 0
2 years ago
There are 320 rods in a mile Find the length of a rod in feet
faust18 [17]
The answer should be 320 rods = 1 mile 5280 ft= 1 mile
Hope this helps you

3 0
3 years ago
Aurora has a cell phone plan that charges $65 for phone service plus $12 for eachgigabyte of data used each month. If her bill f
Ivahew [28]

Answer:

4 gigabytes

Step-by-step explanation:

64+12+12+12+12=113

7 0
3 years ago
Read 2 more answers
2. What is the slope passing through the points (2, -1) and (-4, 11)
algol [13]

Answer:

I believe it is y equals 3 minus 2x.

4 0
2 years ago
The seventh term of an arithmetic progression is equal to twice the fifth term. The sum
mario62 [17]

Answer:

a₁ = - 24

Step-by-step explanation:

The n th term of an AP is

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Given a₇ = 2a₅ , then

a₁ + 6d = 2(a₁ + 4d) = 2a₁ + 8d ( subtract 2a₁ + 8d from both sides )

- a₁ - 2d = 0 → (1)

The sum to n terms of an AP is

S_{n} = \frac{n}{2} [ 2a₁ + (n - 1)d ]

Given S_{7} = 84 , then

\frac{7}{2} (2a₁ + 6d) = 84

3.5(2a₁ + 6d) = 84 ( divide both sides by 3.5 )

2a₁ + 6d = 24 → (2)

Thus we have 2 equations

- a₁ - 2d = 0 → (1)

2a₁ + 6d = 24 → (2)

Multiplying (1) by 3 and adding to (2) will eliminate d

- 3a₁ - 6d = 0 → (3)

Add (2) and (3) term by term to eliminate d

- a₁ = 24 ( multiply both sides by - 1 )

a₁ = - 24

6 0
3 years ago
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