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3 years ago

Answers for the 2 boxes please :)

Mathematics

1 answer:

Leno4ka [110]3 years ago

5 0

Answer:

Step-by-step explanation:

2x - 2y = 2

5x + 2y = 12

7x = 14

(2x - 2y = 2)-5

(5x + 2y = 12)2

-10x + 10y = -10

10x + 4y = 24

14y = 14

x = 2

y = 1

(2,1)

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Answer:a

Step-by-step explanation:The temperature rose by 80 so up the number line and dropped 20 so down the number line to 60

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3 years ago

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Lines 3x-2y+7=0 and 6x+ay-18=0 is perpendicular. What is the value of a?

BlackZzzverrR [31]

Answer:

$\boxed{\sf a = 9 }$

Step-by-step explanation:

Two lines are given to us which are perpendicular to each other and we need to find out the value of a . The given equations are ,

$\sf\longrightarrow 3x - 2y +7=0$

$\sf\longrightarrow 6x +ay -18 = 0$

Step 1 : Convert the equations in slope intercept form of the line .

$\sf\longrightarrow y = \dfrac{3x}{2} +\dfrac{ 7 }{2}$

and ,

$\sf\longrightarrow y = -\dfrac{6x }{a}+\dfrac{18}{a}$

Step 2: Find the slope of the lines :-

Now we know that the product of slope of two perpendicular lines is -1. Therefore , from Slope Intercept Form of the line we can say that the slope of first line is ,

$\sf\longrightarrow Slope_1 = \dfrac{3}{2}$

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Step 3: Multiply the slopes :-

$\sf\longrightarrow \dfrac{3}{2}\times \dfrac{-6}{a}= -1$

Multiply ,

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3 years ago

Surface area of a box 12 x 6 x 9.5

Ber [7]

9514 1404 393

Answer:

486 square units

Step-by-step explanation:

Use the surface area formula with the given numbers.

SA = 2(LW +H(L +W))

SA = 2(12·6 +9.5(12 +6)) = 2(72 +9.5(18)) = 486

The surface area of the box is 486 square units.

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3 years ago

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Answer:

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3 years ago

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vladimir2022 [97]

Answer:

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Step-by-step explanation:

if he received 10 less than half then you would just have to add that 10 back and multiply by 2.

150+10=160*2=320

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3 years ago

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Answers for the 2 boxes please :)​

Answers for the 2 boxes please :)