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Sonbull [250]
3 years ago
7

Can anyone help me with this?

Mathematics
1 answer:
Hunter-Best [27]3 years ago
5 0

Answer:

Option (2)

Step-by-step explanation:

Option (1).

Time taken by Tina to walk = 56 minutes

Time taken by her sister to walk the same distance = x minutes

If both the sisters take the same time to walk, then

x = 56 minutes

Option (2).

Let the height of Tina = x inches

and the height of her brother = 56 inches

if Tina is shorter than her brother then,

x < 56 inches

Option (3).

Tina's dog weighed two months ago = 56 pounds

If the dog gained the weight in two months then weight before 2 months will be less than the present weight.

Let the weight of her dog is x pounds now,

x > 56 pounds

Option (4).

Amount with Tina = $x

Cost of the camera = $56

If the money with Tina has enough money to buy the camera, then the amount of money with her will be higher than the cost of the camera.

x > $56

Option (2) will be the answer.

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Si el gerente de control de calidad desea estimar la media de vida de lámparas con 20 horas, con un nivel de confianza del 95% y
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English translation:

If the quality control manager wants to estimate the average life of lamps with 20 hours, with a confidence level of 95% and an error of 10% is assumed. What is the sample size?

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3 years ago
The product of two consecutive positive odd numbers is 195.By constructing a quadratic equation and solving it, find the two num
Tomtit [17]

Step-by-step explanation:

x = one odd number

the second odd number is (x+2), as both are consecutive.

so,

x × (x + 2) = 195

x² + 2x = 195

x² + 2x - 195 = 0

the formula to solve this is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

a = 1

b = 2

c = -195

x = (-2 ± sqrt(4 - 4×1×-195))/(2×1) =

= (-2 ± sqrt(4 + 4×195))/2 = (-2 ± sqrt(784))/2 =

= (-2 ± 28)/2 = -1 ± 14

x1 = -1 + 14 = 13

x2 = -1 - 14 = -15 which is invalid as the numbers are positive.

so, the two numbers are 13 and 15.

5 0
3 years ago
54 is 120% of what number? Explain please!
Nataly [62]
\displaystyle \text{54 is 120\% of what number} \\ \text{is will be = } \\ \text{of will be  } \cdot \\ \text{what number will be z} \\ ---------- \\ 54=120\% \cdot z \\ \\ 54= \frac{120}{100}\cdot z \\ \\\\ z \cdot  \frac{120}{100}=54  \\ \\ \\ z=54 :  \frac{120}{100} \\ \\ \\ z=54 \cdot \frac{100}{120}  \\ \\ \\ z= \frac{5400}{120} =45
3 0
4 years ago
Read 2 more answers
The number p is 20 more than the number q using algebra write the relationship between P and q
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2 options: p-20=q or p=q+20
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3 years ago
Dale is 4 years older than sue. Five years ago the sum of their ages was 64. How old are they now?
Marizza181 [45]

Answer:

39 and 35

Step-by-step explanation:

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4 years ago
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