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nekit [7.7K]
3 years ago
9

Factor the expression below. 16x^2-49

Mathematics
1 answer:
zysi [14]3 years ago
8 0

Answer:

(4x + 7) (4x - 7)

Step-by-step explanation:

16x^2 will be broken down to 4x and 4x since when you multiply them, it will equal 16x^2

Then -49 can be broken down to 7 & -7 since 7 x (-7) = -49

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How much cashews at $1.58 per pound must be mixed with walnuts that cost 78 cents per pound to make a mixture of 40 pounds of nu
Likurg_2 [28]

Number of pounds of cashews is 36 pounds and number of pounds of walnuts is 4 pounds.

Step-by-step explanation:

  • Step 1: Given details are cost of cashews = $1.58, cost of walnuts = 78 cents = $0.78, total weight of nuts = 40 pounds, cost of nuts per pound = $1.50
  • Step 2: Let number of pounds of cashews to be mixed be C, then number of pounds of walnuts will 40 - C. Form equation with these variables.

⇒ 1.58 C + (40-C) 0.78 = 40 × 1.50

⇒ 1.58 C + 31.2 - 0.78 C = 60

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⇒ 0.8 C = 28.8

⇒ C = 36 pounds

  • Step 3: Calculate number of pounds of walnuts

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3 years ago
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What are the x-intercepts of x^2– 3x = 4?
Sindrei [870]

Answer:

x^2-3x=4

x^2-3x-4=0

x^2-4x+x-4=0

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Step-by-step explanation:

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Step-by-step explanation:

Given

Child Weight = 22.5 kg

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Type of Dose = q8h

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We start by calculating the total daily dosage in mg

This is calculated by multiplying the child weight by the intravenous dosage

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Daily Dosage = 900mg

This implies that the body weight requires 900 mg daily

Next is to calculate the q8h dosage

q8h means every 8 hours.

q8h dosage = 900mg/8

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