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taurus [48]
3 years ago
13

Please help asap !!!

Mathematics
1 answer:
ExtremeBDS [4]3 years ago
8 0

Answer:

(2, 18) and (-3, -7)

Step-by-step explanation:

y = 5x + 8                     Substitute the value for y into the second equation

-10x + 2y = 16

-10x + 2(5x + 8) = 16

-10x + 10x +16 = 16

       16 = 16  True  

These two equation are the same line. So pick one of the equation to check which ordered pairs are true solutions.

Using y = 5x + 8

(0, -6)         -5 = 5(0) + 8 ; -6 = 8  No

(-1, 9)           9 = 5(-1) + 8;   9 = -5 + 8 ;  9 = 3 No

(2, 18)          18 = 5(2) + 8;  18 = 10 + 8 = 18;  18 = 18    Yes

( -3, -7)         -7 = 5(-3) + 8;  -7 = -15 + 8;  -7 = -7    Yes

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7 0
3 years ago
Ken and Ivan had some sweets. After Ken gave away 5/7 of his sweet, he had 2/3 as many sweets as Ivan. Ivan then gave away 120 s
Zielflug [23.3K]

Answer:

Ivan had 288 sweet while Ken had 672 sweets

Step-by-step explanation:

Let the number of sweets owned by Ken and Ivan be k and v respectively.

After Ken gave away 5/7 of his sweet, what he had left

= k - 5k/7

= 2k/7

he had 2/3 as many sweets as Ivan then

2k/7 = 2v/3

Divide both sides by 2 and cross multiply

7v = 3k

Ivan then gave away 120 sweets, Ivan would have

v - 120 = k/4

multiply both sides by 4

4v - 480 = k

7v = 3(4v - 480)

7v = 12v - 1440

12v - 7v = 1440

5v = 1440

v = 1440/5

= 288

7v = 3k

7 * 288 = 3k

k = 7 * 288/3

= 672

3 0
3 years ago
HOW DO YOU FIND ANGLE 1
Minchanka [31]

Answer:

If we add up all the angles of any triangle, we should get 180 degrees. Therefore, Angle C = 90 (angle A) - 45 (angle B) = 45 degrees. Since there was a ray drawn from A through C the exterior angle of angle C is angle 1.

Step-by-step explanation:

a "one angle" A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle in which one full rotation is 360 degrees. ... Because a full rotation equals 2π radians, one degree is equivalent to π180 radians.

7 0
3 years ago
Read 2 more answers
Questions is: the sum of 28+29+42=99. what addition property was used commutative, associative, identity, and distributive ?
Arturiano [62]

Since, it is given that 28+29+42= 99

Now, we have to identify the addition property for the given equation.

Associative property of addition states that for any real numbers say 'a' , 'b' and 'c', a+(b+c) = (a+b)+c

So, in the given question 28+29+42

We can use associative property as

(28+29)+42 = 28+(29+42)

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Hence, among the given properties, associative addition property is used.

8 0
3 years ago
Find the value of x.
kiruha [24]
X=5
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5 0
3 years ago
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