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Oksi-84 [34.3K]
3 years ago
15

Someone please help me asap!

Mathematics
2 answers:
dezoksy [38]3 years ago
8 0

Answer:

a.) 2x+y

2(4)+3

8+3=11

b.) a^2+b

(-2)^2+5

4+5=9

Step-by-step explanation:

babymother [125]3 years ago
4 0

Answer:

a) 11

b) 9

Step-by-step explanation:

a) x=4  y=3

2x+y

2(4)+(3)

8+3

=11

b) a=-2  b=5

a^2+b

(-2)^2+(5)

4+5

=9

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The length of a rectangle is 13 centimeters less than three times its width. Its area is 56 square centimeters. Find the dimensi
tatuchka [14]

Answer:

Area = length  x width

Area = (3width - 13) x width

Area = 3 width^2 -13width

56 = 3width^2 -13 width

Width = 7

Length = (3 *7) -13 = 8

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Y= x^2 -5 solve for x
dexar [7]

Y= x^2 -5

We need to solve for x, we need to get x alone

Y= x^2 -5

Lets start by removing -5

Add 5 on both sides

y + 5= x^2 -5 + 5

y + 5= x^2

Now to isolate x , we need to remove the square from x

To remove square , take square root on both sides

+-\sqrt{y+5} = \sqrt{x^2}

square and square root will get cancelled

+-\sqrt{y+5} = x

So x = +\sqrt{y+5} and  x = -\sqrt{y+5}


7 0
3 years ago
PTG has side lengths of 18 cm, 27 cm, and 13 cm. which type of triangle is PTG? The answer is obtuse.
Verizon [17]
To know what kind of triangle is it. use the pythagorean theorem:
A^2 + B^2 = C^2,
where C is the longest side of the triangle 
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if it does not then A^2 + B^2 > C^2 so it is acute triangle
if A^2 + B^2 < C^2 it is obtuse triangle

18^2 + 13^2 ? 27^2
324 + 169 ? 729
493 < 729 so it is obtuse triangle

3 0
3 years ago
Which of the following would you add to each side of the equation x-9=12 to get the variable by itself?
VLD [36.1K]
X-9=12
x-9+9=12+9
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3 years ago
Order 3/2, 5/8, 9/4, 1 &amp; 7/8 from least to greatest
Bogdan [553]

Answer:

9/4, 3/2, 1, 7/8, 5/8

Step-by-step explanation:

3 0
3 years ago
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