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atroni [7]
3 years ago
12

Plot the points (4, 0) and ( -1 - 2) on the coordinate plane.

Mathematics
1 answer:
Lana71 [14]3 years ago
4 0

Answer:

(8,90)

Step-by-step explanation:

8 and 90 together... (8,90)

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Marco is 8 years younger than his brother Paolo. If their product of their ages is 105, how old is Marco? plz help
Nina [5.8K]

Answer:

Marco's age is 7 years old

Step-by-step explanation:

Let

x ----> Marco's age

y ----> Paolo's age

we know that

x=y-8 ----> y=x+8 ----> equation A

xy=105 ----> equation B

substitute equation A in equation B

x(x+8)=105

x^2+8x-105=0

Solve the quadratic equation

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

x^2+8x-105=0

so

a=1\\b=8\\c=-105

substitute in the formula

x=\frac{-8(+/-)\sqrt{8^{2}-4(1)(-105)}} {2(1)}

x=\frac{-8(+/-)\sqrt{484}} {2}

x=\frac{-8(+/-)22} {2}

x=\frac{-8(+)22} {2}=7

x=\frac{-8(-)22} {2}=-15

Remember that the solution cannot be a negative number

so

The solution is x=7

therefore

Marco's age is 7 years old

4 0
3 years ago
Simplify the following expression:<br> 4(x+10)-3x-2-x
Ilia_Sergeevich [38]
4x+40-3x-2-x
(4x-3x-x)=4x-4x=0
(40-2)=38
The answer will be 38
6 0
3 years ago
Find the integer value of x that satisfies both the inequalities
fomenos
The answer is x = 4 as it satisfies both inequalities :)
7 0
2 years ago
The equation of a circle is ​ (x+7)²+(y−13)²=196 ​ .<br><br><br> What is the center of the circle?
MatroZZZ [7]

Answer:im stuck on the same one

Step-by-step explanation:

7 0
3 years ago
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Use mental math to find the amount of a 12% shipping fee for an item that costs $250. Explain your steps.
makvit [3.9K]
The shipping fee is $30
1. 12%×250
= 250×12/100
= 2.5 ×12
= 5/2×12
=60/2
=30
8 0
4 years ago
Read 2 more answers
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