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3 years ago

If n=3 what would 4(2+n)-6 equal?

Mathematics

1 answer:

Annette [7]3 years ago

4 0

Answer:

$14$

Step-by-step explanation:

$4(2+n)-6$

Replace n with 3:

$4(2+3)-6$

Solve brackets first:

$4\times 5-6$

Multiply next:

$20-6$

Subtract:

$14$

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Find the surface area.<br><br> Any help will be appreciated. Thank you

N76 [4]

Answer: 144 units squared

Step-by-step explanation:

Rec- 3 x 11 = 33

Rec- 4 x 11 = 44

Rec- 5 x 11 = 55

Tri- 3 x 4 = 12 12/.5 = 6

33 + 44 + 55 + (6 x 2)

33 + 44 + 55 + 12 = 144

8 0

3 years ago

One of the legs of a right triangle measures 1 cm and its hypotenuse measures 2 cm.

FromTheMoon [43]

Answer:

1.7 cm

Step-by-step explanation:

The formula to find the hypotenuse: $c^{2} = a^{2} +b^{2}$ . In this case, the hypotenus is given.

1) Substitute the values into the formula.

$2^{2} = 1^{2} +b^{2}$

2) Solve for $b$ .

$4 = 1 + b^{2} \\4 - 1 = b^{2}\\3 = b^{2}\\\sqrt{3} = b\\1.73205 = b$

3) Round the answer to the nearest tenth.

$1.7 = b$

4 0

2 years ago

What substitution should be used to rewrite 4x^4-21x^2+20=0 as a quadratic function?

pogonyaev

Answer:

see explanation

Step-by-step explanation:

Let u = x² ( choice of variable is flexible ), then

4u² - 21u + 20 = 0 ← expressed as a quadratic

This can now be solved for u and converted back into terms of x

3 0

3 years ago

Read 2 more answers

Midpoint of the segment whose endpoints are (6,9) and (-4,16)

pychu [463]

Answer:

(4,5)

Step-by-step explanation:

(xa+xb/2,ya+yb/2)

(0+8/2,2+8/2)

(8/2,10/2)

(4,5)

hope this helps

3 0

4 years ago

a figure that has a vertex at (2,3) has the y-axis as a line of symmetry. Tell the coordinates of another vertex of the figure

aleksley [76]

Answer:

-2, 3

Step-by-step explanation:

That would mean that the other side (the y axis splitting it) would be the same numbers but different signs. The figure's vertex (2,3) is from the 1 quadrant and the one across the y axis is (-2,3) which is in the second quadrant.

hope this helps!!

6 0

3 years ago