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2 years ago

What is 7x + 15 = 9x + 15 - 2x + 1 and how many solutions are there

Mathematics

2 answers:

RSB [31]2 years ago

5 0

Step-by-step explanation:

7x + 15 = 9x + 15 - 2x + 1

7x + 15 = 7x + 16

Bringing like terms on one side

7x - 7x = 16 - 15

x = 1

7x + 15 = 9x + 15 - 2x + 1

7x + 15 = 7x + 16

Bringing like terms on one side

15 - 16 = 7x - 7x

-1 = x

There are two solutions

Olin [163]2 years ago

5 0

Answer:

no solutions

Step-by-step explanation:

7x + 15 = 9x + 15 - 2x + 1

Combine like terms

7x+15 = 7x+16

Subtract 7x from each side

7x+15-7x = 7x+16-7x

15 =16

This is not a true statement so there are no solutions

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sarabeth is making beaded necklaces to give to five of her friends for homecoming she has 10 ft of elastic string each necklace

babunello [35]

Answer:

Yes, she has enough strong to make necklaces for five friends

Step-by-step explanation:

10 ft= 120 inches

120/20 9=in per necklace= 6

she has enough to make 6 necklaces and she only has to make five so yes

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3 years ago

Barbara purchased a home entertainment center for $2,665 using an 18-month deferred payment plan with an interest rate of 24.36%

Andre45 [30]

Answer:

P = $ 144.99

Step-by-step explanation:

Given data:

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duration of deferred payment plan is 18 month

interest rate is 24.36%

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A = 3695.88

From the information in the questioon this amount is to be paid in 3 year . Thus we have

Monthly payment is =

$P = \frac{r(Pv)}{1 - (1+ r)^{-n}}$

p = monthly payment

Pv = present value = 3695.88

r =rate per period $= \frac{24.36}{12} = 0.020$

n = number of period $= 12\times 3 = 36$

plugging all value in the above formula

$P = \frac{0.020\times 3695.88}{1 - (1+0.020)^{-36}}$

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3 years ago

If a discriminant is negative, then the quadratic has:

Serjik [45]

Step-by-step explanation:

the answer is

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7 0

3 years ago

Read 2 more answers

Suppose that 13 inches of wire costs 78 cents.

GarryVolchara [31]

Answer:

$0.42

Step-by-step explanation:

create a proportion:

13/.78 = 7/x

cross-multiply to get:

13x = 7(.78)

13x = 5.46

x = 5.46/13

x = .42

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3 years ago

Complete the chart below to show the properties that hold true for the quadrilateral given in each row.

puteri [66]

Hey there!

Opposite sides are congruent:

all of them

opposite angles are congruent

rectangle and square

all sides are congruent

rhombus and square

diagonals congruent:

rectangle, rhombus, and square

diagonals are perpendicular

square and rhombus

Have a terrificly amazing day!

6 0

3 years ago