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2 years ago

Which expression to a+ (c+7)?

Mathematics

1 answer:

Ann [662]2 years ago

7 0

Answer:

(a + c) + 7

hope this helps

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3x + ky = 8

sattari [20]

Answer:

(a): x is 3 and ky is -1

(b): k is -2

Step-by-step explanation:

Let: 3x + ky = 8 be equation (a)

x - 2 ky = 5 be equation (b)

Then multiply equation (a) by 2:

→ 6x + 2ky = 16, let it be equation (c)

Then equation (c) + equation (b):

${ \sf{(6 + 1)x + (2 - 2)ky = (16 + 5)}} \\ { \sf{7x = 21}} \\ { \sf{x = 3}}$

Then ky :

${ \sf{2ky = 3 - 5}} \\ { \sf{ky = - 1}}$

${ \bf{y = \frac{1}{2} }} \\ { \sf{ky = - 1}} \\ { \sf{k = - 2}}$

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2 years ago

Which graph shows a negative rate of change for the interval 0 to 2 on the x-axis

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Answer:

-2

Step-by-step explanation:

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3 years ago

Really confusing......

valina [46]

Answer:

She spent 40 more dollars or to be exact 40.70 dollars more then aiden

Step-by-step explanation:

Aiden bought 60 candles.

0.37*60 is equal to $22.20

Aidens sister bought 170 candles at same price of $0.37

0.37*170=$62.90

Now subtract

$62.90-22.20=$40.70

She spent 40 more dollars or to be exact 40.70 dollars more then aiden

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2 years ago

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Calculate the perimeter and the area of the figure. top answer gets brainlest

Simora [160]

Answer:

area: 72 perimeter: 36

Step-by-step explanation:

area of big rectangle, 10x6=60

height of triangle:4 multiplied by 3 (6/2=3) =12 12+60=72

length of sides added together: 10+10+6+5+5=36

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2 years ago

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For t=2 , 14t−3t is equal to ____? and 3t−14t is equal to ____?

const2013 [10]

Answer:

14t-3t=22

3t-14t= -22
where there is t multiply by 2

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2 years ago

Which expression to a+ (c+7)?​

Which expression to a+ (c+7)?