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3 years ago

Help pls i need i got 2 mins

Mathematics

2 answers:

serious [3.7K]3 years ago

6 0

Answer:

The new position of the bird is 1 ft below surface of pond.

Step-by-step explanation:

- Position of water bird after 15ft dive:

11-15= -4ft

- Position of water after rising 3 feet:

-4+3= -1ft

Therefor it id 1ft below the surface of the pond

Luda [366]3 years ago

3 0

Answer:

The water bird is negative 1 or -1 feet in the water.

Step-by-step explanation:

11 - 15 = -4

Then the water bird rises 3 feet under water to catch a fish.

-4 + 3 = -1.

Hope this helps.

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The product of two positive consecutive numbers is 42. What is the smaller number?

Temka [501]

X = first integer, y = second integer (right after x)

since y is right after x, we can say
y = x+1

If the product of the two integers (x and y) is 42, then
x*y = 42
x*( y ) = 42
x*( x+1 ) = 42 ... y is replaced with x+1
x*x + x*1 = 42
x^2 + x = 42
x^2 + x - 42 = 0
(x + 7)(x - 6) = 0 ... factor
x + 7 = 0 or x - 6 = 0
x = -7 or x = 6

The result must be positive as the problem states it, so we toss out x = -7
The only answer is x = 6

If x = 6, then
y = x+1
y = 6+1
y = 7

The two consecutive numbers are 6 and 7

The final answer is 6

Sure enough, 6*7 = 42 checks out

8 0

3 years ago

Two different weight loss programs are being compared to determine their effectiveness. Ten men were assigned to each program (t

True [87]

Answer:

WE reject the Null and conclude that one of the drug is more effective than the other.

Step-by-step explanation:

Given :

Diet 1 3.4 10.9 2.8 7.8 0.9 5.2 2.5 10.5 7.1 7.5

Diet 2 11.9 13.1 11.6 6.8 6.8 8.8 12.5 8.6 17.5 10.3

This is a matched pair sample :

The hypothesis :

H0 : μd = 0

H1 : μd ≠ 0

Hence, we intun the difference between the two groups of value :

Difference, d = -8.9,-2.2,-8.8,1,-5.9,-3.6,-10,1.9,-10.4,-2.8

The test statistic :

dbar ÷ (Sd/√n)

dbar = mean of difference = Σd / n = - 49.7 / 10 = - 4.97

Standard deviation of difference, Sd = 4.51

Test statistic :

-4.97 ÷ (4.51/√10)

Test statistic = - 3.485

The sample size, n = 10

df = n - 1 ; 10 - 1 = 9

Critical value (0.10, 9) = 1.833

If Test statistic > |Critical value |

Since 3.486 > 1.833 ; WE reject the Null and conclude that one of the drug is more effective than the other

5 0

3 years ago

A violin was on sale of 50%

irinina [24]

If it is 50% then it should be half of the original price.

For Example: $30.00 - 50%... the answer would be $15.00 since its the half of the $30.00

6 0

3 years ago

______ is a part of a whole. * 2 points A. Fraction B Cake C Bar D Pizza

Assoli18 [71]

Answer:

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3 years ago

(-0.3) ÷ (-0.2)+(-2.56)<br><br><br> In whole numbers with steps please

Valentin [98]

Answer:

-1 to the nearest whole number.

Step-by-step explanation:

(-0.3) ÷ (-0.2)+(-2.56)

Order of operations - the division is done first:

= 1.5 = (-2.56)

= 1.5 - 2.56

= -1.06.

6 0

3 years ago