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VMariaS [17]
3 years ago
5

Evaluate please 2x+(−6)∙(y+1) for x=−1.5 and y=−3

Mathematics
2 answers:
Andreyy893 years ago
8 0
First, you plug your given values in. Since x is 1.5, it will be multiples by 2x to get 3.2. Since y is -3, it will be added to 1 to get -2. Finally, the two are multiplied together to get -6.4 if I am correct. 
DochEvi [55]3 years ago
8 0

Answer:

9

Step-by-step explanation:

2 multiplied by -1.5 = -3.0

y + 1 = -2

So, the equation would be:

-3 - 6 multiplied by -2

Using the rule of PEMDAS, you would multiply -6 and -2 first, making the new equation now:

-3 <u>+</u> 12

12 - 3 = <u>9,</u> resulting in the answer.

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Please help me answer this for a test im having trouble
Dimas [21]

Answer:

x + 1

y = 9

Step-by-step explanation:

In order to solve this question we need to represent "y "in terms of "x" in the first equation, and the plug in the "y" value in the first equation into the second one. Luckily for us in the first equation it already shows what "y" is equal to in terms of "x" (based on the first equation y = -x + 10). Now we just need to plug in the value that we got instead of "y" in the second equation, and so we get....

y = 7x + 2

(plug in the y value and get the following ….)

-x + 10 = 7x + 2

(now just solve the following equation)

-x + 10 + x = 7x + 2 + x

10 = 8x + 2

10 - 2 = 8x + 2 - 2

8 = 8x

8/8 = 8x/8

1 = x

Now that we know the value of "x", all we need to do now is substitute the value of "x" into any of the equations and we will get the value of "y". So we do the following.....

y =  7x + 2

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3 0
3 years ago
NEED ANSWERS ASAP PLEASE
weqwewe [10]

Answer:

72

Step-by-step explanation:

u can see its a right triangle u can see its kinda like 3-4-5 right triangle

75/5 = 15

21/3 = 7

ok so it doesn't work

now

75^2 - 21^2 = 5184

square root of 5184 = 72

3 0
3 years ago
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