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2 years ago

Will a 9m long planks fit into a square room of side 7m? please I really needed help with this one

Mathematics

1 answer:

Darya [45]2 years ago

5 0

No because if it is a square all the sides are 7m long so a 9m plank will not fit. Hope this helps.

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Brittany surveyed the students in three different Chemistry classes regarding the average number of hours of sleep they get each

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Class B has the most consistant sleep because there is less of a difference between 6.87 and 3.65 than the other classes.

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2 years ago

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Find the area of quadrilateral ABCD. Round the area to the nearest whole number, if necessary. A(-5, 4) 4 B(0, 3) 2. F(-2, 1) -2

valentina_108 [34]

Answer:26

Step-by-step explanation:

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2 years ago

If each term in the sum a1+a2+a3+...+an is either 7 or 77 and the sum equals 350, which of the following could be equal to n?A.

Svetlanka [38]

Answer:

C. 40

Step-by-step explanation:

Let us say there are x 7's and y 77's.

We have been given that each term in the sum a1+a2+a3+...+an is either 7 or 77 and the sum equals 350. We are asked to find the value of n.

Since the sum of all numbers is 350, so we can represent this information in an equation as:

$7x+77y=350$

The only integer solutions for the equation $7x+77y=350$ are 10, 20, 30, 40, 50 .

So, there can be these many terms: 10 or 20 or 30 or 40 or 50 .

The given option only contains 40, so 40 would be the answer. For 40 terms to be there, there has to be 39 sevens and 1 seventy-seven.

Let us verify our answer.

$7x+77y=350$

$7(39)+77(1)=350$

$273+77=350$

$350=350$

Therefore, the total terms (n) could be equal to 40 and option C is the correct choice.

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2 years ago

LeAnn is purchasing giftwrap for a box that measures 8 inches long, 6 inches wide, and 6 inches tall. Calculate the total area o

Pavel [41]

Let

L---------> the length side of the box

W--------> the width side of the box

H-------> the height of the box

we know that

$L=8\ in\\W=6\ in\\H=6\ in$

the surface area of the box is equal to

$S=2*area\ of\ the\ base+perimeter\ of\ the\ base*H$

$A=L*W=8*6=48\ in^{2}$

<u>Find the perimeter of the base</u>

$P=2*L+2*W=2*8+2*6=28\ in$

<u>Find the surface area</u>

$S=2*48+28*6$

$S=264\ in^{2}$

therefore

<u>the answer is</u>

the total area of the box that will be covered in gift wrap is $264\ in^{2}$

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2 years ago

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Find the surface area of the triangular prism. A triangular prism. The base is a right triangle with base 1 foot, height 2 feet

mylen [45]

Answer:

Step-by-step explanation:

The formula for calculating the surface area of a triangular prism is expressed as shown below:

SA= bh + pH

b= base of the triangle

h- height of the triangle

p= perimeter of the triangle

H= height of the prism

Given b = 1foot

h = 2feet

perimeter of the triangle = sum of all its sides = 1ft + 2ft + 2.2ft

p = 5.2ft

H = 3ft

Substituting the values into the formula for finding the surface area:

SA = 1(2)+5.2(3)

SA = 2+15.6

SA = 17.6ft²

The surface area of the triangular prism is 17.6ft²

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2 years ago