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4 years ago

Enter numbers to evaluate - 13-(-23). - 13–(-23)=-13+ Pls help me

Mathematics

1 answer:

Nadusha1986 [10]4 years ago

5 0

Answer:

Step-by-step explanation:

(-)(-) = (+)

(+)(-) = (-)(+) = (-)

(+)(+) = (+)

We have -(-23) = (-)(-)23 = +23 = 23

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dimaraw [331]

Answer:

Step-by-step explanation:

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3 years ago

Tim solved a subtraction problem. Write a number sentence to show the problem and answer. Tell how you got your answer. tim's an

Igoryamba

Answer:

<em>Problem with the subtraction is </em><em>950 - 863 = 87.</em>

Step-by-step explanation:

Now let us suppose Tim began at number 863 and finished at number 950. The numbers 7 + 30 + 50, or 87 were added.

He later discovered that 863 + 87= 950.

<em>Therefore the problem with the subtraction is 950 - 863 = 87.</em>

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3 years ago

Please help me with this question #15

statuscvo [17]

The answer is B. You are getting rid of one x is the answer is x^2.

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4 years ago

Suppose two telephone poles are 60 ft apart and the length of the wire between the poles is 61 ft. If the lowest point of the wi

Brut [27]

Answer:

H=22.5ft

Step-by-step explanation:

According to the graph, we must find y to determine the height at which the rope must be placed so that the lowest point of the rope is 17 ft high .

applying the pythagorean theorem

$h^{2}=x^{2} +y^{2}\\y^{2}=h^{2} -x^{2}\\y^{2}=30.5^{2} -30^{2}\\ y^{2}=930.25-900\\y=\sqrt{30.25}=5.5ft$

then H=17ft+5.5ft=22.5ft

5 0

3 years ago

A rancher is going to fence three sides of a corral next to a river. He needs to maximize the corral area using 240 feet of fenc

professor190 [17]

Answer:

A. 60 feet B. 7200 ft²

Step-by-step explanation:

A. Find the length of the corral along the river that will give the maximum area

To find the length of the corral that will give the maximum area, we differentiate A with respect to x and equate it to zero.

So, dA(x)/dx = d[x(240 - 2x)]/dx

= (240 - 2x)dx/dx + xd(240 -2x)/dx

= 240 - 2x -2x

= 240 - 4x

So, dA(x)/dx = 0

240 - 4x = 0

4x = 240

x = 240/4

x = 60 feet

B. Find the maximum area of the corral

The maximum area at x = 60 feet is

A(x)=x(240−2x)

A(60)=60(240−2(60))

A(60) = 60(240 - 120)

A(60) = 60(120)

A(60) = 7200 ft²

4 0

3 years ago