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mariarad [96]
3 years ago
11

Is (5,2) a solution to this system? x+4y=13 x-y=3 *

Mathematics
2 answers:
kompoz [17]3 years ago
8 0

Answer:

yes

Step-by-step explanation:

kirza4 [7]3 years ago
5 0

Answer:

Yes.

Step-by-step explanation:

x + 4y = 13

 x - y = 3              Subtracting:

0 + 4y - (-y) = 13 - 3

5y = 10

y = 2.

Plug y = 2 into the second equation:

x - 2 = 3

x = 5.

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The pyramid ABCDE has a square base. the pyramid is 20cm high and each sloping edge measures 30cm. calculate the length of the s
Amanda [17]

Answer:

44.8 cm

Step-by-step explanation:

Vertical height (h) = EM = 20 cm

Slant height (l) = 30 cm

This two heights form a right angle at the interception at the base. Thus, we have a right angle triangle.

The length of the sides of the base = 2 × the base of the right triangle

✔️Use Pythagorean theorem to find the base of the right triangle formed. Thus: c² = a² + b²

a = base of the triangle

b = h = 20 cm

c = l = 30 cm

Plug in the values

30² = a² + 20²

a² = 30² - 20²

a² = 500

a = √500

a = 22.4 cm

✔️length of the sides of the base = 2 × the base of the right triangle

= 2 × a

= 2 × 22.4

= 44.8 cm

8 0
4 years ago
The high temperature on friday was 8 degrees above zero
pshichka [43]
0-8=-8
the answer is -8
6 0
3 years ago
What is the domain and range for y=sqrt(x-4)?
Lesechka [4]

Domain: set of all numbers that can be inputted into a function

Since you cannot take the square root of a negative number, this means that x-4 CANNOT be negative. So it's either 0 or it's positive.
So.. <span>x−4≥0
</span>x−4+4≥0+<span>4
</span>x≥<span>4

</span>So this says: "Any number greater than or equal to 4 will result in x-4 being either 0 or some positive number"
So this means that the domain is

<span>{x|x≥4}

</span>This basically says: "the domain is the set of all numbers x such that x is greater than or equal to 4"

In interval notation, the domain is <span>[4,∞)


</span>The range is the set of all possible outputs. We can find the most extreme point of the range by plugging in the most extreme value for the domain <span>
sqrt(x-4) = </span>sqrt(4-4) = <span>sqrt(0) = 0

</span>So the smallest possible output is y=0, which means that the range is
<span>{y|y≥0<span>}
</span></span>
This basically says: "the range is the set of all numbers y such that y is greater than or equal to 0"

In interval notation, the range is

<span>[0,∞)</span>

6 0
4 years ago
2+2-2*2/2=? What's the answer to this over complicated math equation.
gulaghasi [49]
The answer is 2 because 2+2-2*2/2
=4-2*1
=4-2
=2
5 0
3 years ago
Read 2 more answers
Solve the system of equations.
notka56 [123]

Answer:

A

Step-by-step explanation:

replace y with 5 giving you 5 = x^2 - 4 then solve giving you x^2 = 9 and then square the 9 giving you x = 3

5 0
3 years ago
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