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2 years ago

Points on graphs choose all items which are true

Mathematics

1 answer:

Aneli [31]2 years ago

7 0

Answer:

the 3rd 4th and 5th answers are true

Step-by-step explanation:

just substitute the points into the equations.

first equation, substitute the points 2,8 into the equation. 2 + 2(8) = 20.

2 + 16 = 20

18 = 20 is not a true statement.

second equation, substitute the points -1,5 into the equation. -1 + 2(5) = 10.

-1 + 10 = 10

9 = 10 is not a true statement.

third equation, substitute the points 7,7 into the equation. 2(7) - 7 = 7.

14 - 7 = 7

7 = 7 is a true statement.

fourth equation, substitute the points 7,-7 into the equation. 3(7) + -7 = 14.

21 + -7 = 14

14 = 14 is a true statement.

fifth equation, substitute the points 1, 1 into the equation. 2(1) + 6(1) = 8.

2 + 6 = 8

8 = 8 is a true statement.

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The length of a rectangle is 24 units. Can the perimeter x of the rectangle be 60 units when its width y is 11 units? (1 point)

zlopas [31]

The first choice is correct. No, the rectangle cannot have x=60 and y=11 because x=48+2y.

Perimeter is x=2w+2y. Therefore x=2(24)+2(11) which equals 70 not 60.

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3 years ago

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valentinak56 [21]

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Step-by-step explanation:

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2 years ago

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Lelu [443]

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Step-by-step explanation:

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3 years ago

Read 3 more answers

PLS HELP ME WITH THIS!!!!!! HOW DID THEY GET 80ft^2

noname [10]

$\huge \boxed{\mathfrak{Question} \downarrow}$

Determine the surface area of the right square pyramid.

$\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}$

The formula for finding the surface area of a right square pyramid is ⇨ b² + 2bl, where

b = base of the right square pyramid
l = slant height of the right square pyramid.

In the given figure,

base (b) = 4 ft.
slant height (l) = 8 ft.

Now, let's substitute the values of b & l in the formula & solve it :-

$\sf \: {b}^{2} + 2bl \\ = \sf \: {4}^{2} + 2 \times 4 \times 8 \\ = \sf \: 16 + 8 \times 8 \\ = \sf \: 16 + 64 \\ = \huge\boxed{\boxed{ \bf 80 \: ft ^{2} }}$

So, the surface area of the right square pyramid is 80 ft².

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2 years ago