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aleksandr82 [10.1K]
3 years ago
5

Kristin bought 8 books for a total of $238.60. Math books cost $29.60 and

Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
5 0

Answer: 2 Math books and 6 English books

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Help me<br> Verified and certified by me<br> -ayyyyyyy
spayn [35]

Answer:

c. 412.5 cm^2

Step-by-step explanation:

first triangle: 5 x 15 = 75

75/2 = 37.5

rectangle:  15 x 19 = 285

triangle 2: 15 x 12 = 180

180/2 = 90

37.5 + 285 + 90 = 412.5

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3 years ago
What kind of transformation converts the graph of f(x)= - 2x–10 into the graph of g(x)= - 2x+10?
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Translate the graph of f(x) UP 20 units.
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Which of the following expressions are equivalent to 2/x^4-y-^4 choose all that apply
Kaylis [27]

Answer:

B and D.

Step-by-step explanation:

B.  The numerator = 2*1 = 2 and x^4 - y^4 = (x^2 - y^2)(x^2 + y^2).

D .  (x^2)^2  - (y^2)^2 = x^4 - y^4.

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3 years ago
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Solve using the quadratic formula. Show all work. Write each solution in simplest form. No decimals.
8090 [49]

Answer:

Option B.

{–9 + i√225 / 24, –9 – i√225 / 24}

Step-by-step explanation:

12a² + 9a + 7 = 0

Using formula method, the solutions to the equation can be obtained as follow:

Coefficient of a² (a) = 12

Coefficient of a (b) = 9

Constant (c) = 7

a = –b ±√(b² – 4ac) / 2a

a = –9 ±√(9² – 4 × 12 × 7) / 2 × 12

a = –9 ±√(81 – 336) / 24

a = –9 ±√(– 225) / 24

Recall

–225 = –1 × 225

Thus,

–9 ±√(– 225) / 24 = –9 ±√(–1 × 225)/24

Recall

√(–1 × 225) = √–1 × √225 = i√225

Thus,

–9 ±√(–1 × 225)/24 = –9 ± i√225/24

Therefore,

a = –9 ± i√225/24

a = –9 + i√225 / 24 or –9 – i√225 / 24

Therefore, the solutions to the equation are:

{–9 + i√225 / 24, –9 – i√225 / 24}

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3 years ago
Angela can spend no more than $225 to rent a jackhammer and demolish a pool A rental jackhammer
9966 [12]

Answer:

Step-by-step explanation:

35 + 10 equals 45

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3 years ago
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