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stellarik [79]
3 years ago
8

3x+y=4 2x+y=5 solve using linear combination

Mathematics
2 answers:
Advocard [28]3 years ago
3 0
Idk what linear combination is but you can solve this way:
3x+y=4
-2x-y=-5
x=-1
3(-1)+y=4
-3+y=4
y=7
So x=-1 and y=7
BabaBlast [244]3 years ago
3 0

Answer:

(-1,7)

Step-by-step explanation:

Add the equations in order to solve for the first variable. Plug this value into the other equations in order to solve for the remaining variables.

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Oduvanchick [21]
The answer is 10 days

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4 0
3 years ago
Plzzzzzzzz helllllllppppppppp
Naddik [55]

Answer:

1/4p +1.5

Step-by-step explanation:

p = plant stand

The bookshelf is 1/4 the height of the plant stand plus 1.5 ft

1/4p +1.5

4 0
2 years ago
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(4x+3)(3x)-25 graph
maw [93]

Answer:

12x^2+9x^2-25    (quadratic equation)

a=12, b=9, c=-25

put this in quadratic formula

Step-by-step explanation:

4 0
3 years ago
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How can you express the properties of operations to evaluate this expression 18 + 4(28)
Akimi4 [234]

Answer:

I don't know if I'm understanding your question correctly. But I'll try...

In this problem you need to remember PEMDAS!

Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction.

18 + 4(28)     -First you would multiply 4 by 28 since the 28 is in parentheses.

18 + 112        -Now you would add to find your answer

= 130

I hope this helps!

-Mikayla


3 0
3 years ago
The manufacturing of a ball bearing is normally distributed with a mean diameter of 22 millimeters and a standard deviation of .
Misha Larkins [42]

Answer:

0.1507 or 15.07%.

Step-by-step explanation:

We have been given that the manufacturing of a ball bearing is normally distributed with a mean diameter of 22 millimeters and a standard deviation of .016 millimeters. To be acceptable the diameter needs to be between 21.97 and 22.03 millimeters.

First of all, we will find z-scores for data points using z-score formula.

z=\frac{x-\mu}{\sigma}, where,

z = z-score,

x = Sample score,

\mu = Mean,

\sigma = Standard deviation.

z=\frac{21.97-22}{0.016}

z=\frac{-0.03}{0.016}

z=-0.1875

Let us find z-score of data point 22.03.

z=\frac{22.03-22}{0.016}

z=\frac{0.03}{0.016}

z=0.1875

Using probability formula P(a, we will get:

P(-0.1875

P(-0.1875  

P(-0.1875

Therefore, the probability that a randomly selected ball bearing will be acceptable is 0.1507 or 15.07%.

6 0
3 years ago
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