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8090 [49]
3 years ago
7

PLSS HELPPPP Find the value of the expression a + b, when a= -2 and b= 5

Mathematics
2 answers:
Xelga [282]3 years ago
8 0

Answer:

3

Step-by-step explanation:

because your basically just 5-2

Ulleksa [173]3 years ago
7 0

Answer:

When a=-2, and b=5, a+b = -2+5, which is equal to 3.

Let me know if this helps!

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Perpendicular to y=4x-7; contains the point (4,3)
san4es73 [151]
Okay, so a general rule for finding perpendicular lines in the form of y = mx + b is y = (-1/m) + b.
First, let's ignore b (-7) because we're going to find that later.
A perpendicular line to y = 4x + b is y = -1/4x + b.
Alright, so now let's plug in the values. They are in the form of (x,y), so let's plug them in accordingly.

3 = -1/4(4) + b
3 = -1 + b
b = 4
y = -1/4x + 4
So a line perpendicular to y = 4x - 7 is y = -1/4x + 4.
5 0
3 years ago
Jasmine is a receptionist at a doctor's office she books 86 appointments each day four out of every 24 appointments are canceled
bonufazy [111]

Answer:

3.07

Step-by-step explanation:

(86.0/(4.0+24.0))

5 0
3 years ago
The standard deviation of the data set is 2.3. Compute the variance to the nearest hundredth. 2,2,2,3,5,5,6,7,8
Arada [10]
The standard deviation is the square root of the variance...so that means the variance is the standard deviation squared.

2.3^2 = 5.29 <===
7 0
3 years ago
I can't fail and no one has answered my previous questions so please help.
Afina-wow [57]
When you know your equation f(x) and they want you to find f(-4), it means that they want to know what f(x) is worth when x=-4 Therefore, you only need to plug in you x in the equation f(x)=5x-2 f(-4)=5(-4)-2 =-20-2 =-22 (B)
8 0
3 years ago
Can someone help me with how to show the work.
mylen [45]

Answer:

x=2

Step-by-step explanation:

you can see explanation as attached file

3 0
3 years ago
Read 2 more answers
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