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____ [38]
3 years ago
5

Solve by substitution please??? Immediate help!

Mathematics
1 answer:
marta [7]3 years ago
3 0
Solve for the first variable in one of the equations, then substitute the result into the other equation.
3. (1/2, -1,2)
4. (2, -4)
You can get step by step at:
https://www.mathpapa.com/algebra-calculator.html
You might be interested in
HELPP PLEASE
umka21 [38]

Answer:

27.5 mm

Step-by-step explanation:

The game piece has the shape of two identical square pyramids attached at their bases. Given that the perimeters of the square bases are 80 millimeters, and the slant height of each pyramid is 17 millimeters.

Let the side length of each of the side of the base of the pyramid be b, hence:

perimeter = 4b

80 = 4b

b = 20 mm. half of the side length = b/2 = 20 / 2 = 10 mm

The slant height (l) = 17 mm, Let h be the height of one of the pyramid, hence, using Pythagoras theorem:

(b/2)² + h² = l²

17² = 10² + h²

h² = 17² - 10² = 189

h = √189

h = 13.75 mm

The length of the game piece = 2 * h = 2 * 13.75 = 27.5 mm.

6 0
3 years ago
Cole bought a cutting board online. It cost $23 plus 10% shipping and handling. What was the total cost?
Rashid [163]
Cole would pay $25.30 
Because 23/10=2.3
2.3+23=25.3
Hope this helped
3 0
3 years ago
How many solutions does the equation have?<br> x^4 + 7x^2 – 144 = 0
Amiraneli [1.4K]

Answer:

The equation has no real solutions. It has 2 imaginary, or complex solutions.

Step-by-step explanation:

7 0
3 years ago
15. Which set of numbers forms a Pythagorean triple?
dusya [7]

Answer:

11, 60.61

Step-by-step explanation:

this is the only set that fits a^2 +b^2=c^2

you square the first two numbers, add them together. Then you take the square root of that sum. This number must equal the third number for it to be a triple.

4 0
3 years ago
What is the length of A
Marizza181 [45]

Step-by-step explanation:

Since the triangles are right angled and are similar,

by Pythagoras theorem,

(10√3)^2 = (5√3)^2 + a^2

a = 15, a > 0

Topic: Pythagoras theorem

If you like to venture further, do check out my insta (learntionary) where I regularly post useful math tips! Thank you!

6 0
3 years ago
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