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3 years ago

I need help someone please

Mathematics

1 answer:

IgorLugansk [536]3 years ago

7 0

Answer: The answers are in the steps.

Step-by-step explanation:

A) 4 $\frac{1}{2}$ = 9/2 * 13 = 117/2

B ) 13 ( 58 + 1/2)

= 754 + 6.5

= 760.5

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Solve the following system: 3x + 2y = 7 -4.5x - 3y = -10.5

valentina_108 [34]

Answer:

infinitely many solutions

Step-by-step explanation:

The system of equations :

3x + 2y = 7
-4.5x - 3y = -10.5

Multiplying Equation 1 times 3 and Equation 2 times 2 :

9x + 6y = 21
-9x - 6y = -21

Putting the equations in standard form after simplifying :

6y = -9x + 21 ⇒ y = -1.5x + 3.5
-6y = 9x - 21 ⇒ y = -1.5x + 3.5

As both equations are the same, the system will have infinitely many solutions.

4 0

2 years ago

How do you write 1/5 as a decimal

PSYCHO15rus [73]

0.20 is the answer, you brainy boy, you

3 0

3 years ago

Write an expression to represent: Nine less than the quotient of two and a number z.

Nina [5.8K]

Answer:

2 / z - 9

Step-by-step explanation:

Don't worry division always goes before subtraction so you don't need any parenthesis.

Tell me if I'm wrong :)

8 0

3 years ago

In ΔLMN, the measure of ∠N=90°, the measure of ∠M=17°, and MN = 20 feet. Find the length of LM to the nearest tenth of a foot.

andrey2020 [161]

20.9 ft
This is a right triangle trigonometry question because N is 90 degrees. MN is adjacent to M and LM is the hypotenuse. Adjacent any hypotenuse use the cosine function.
$cos \theta = \frac{adj}{hyp}$
plug in known values
$cos(17) = \frac{20}{x}$
switch cos(20) and x using the products property
$x = \frac{20}{cos(17)}$
plug into calculator to get 20.9 ft

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3 years ago

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Is the system of equations is consistent, consistent and coincident, or inconsistent? y=−12x+3y=4x+2 Select the correct answer f

Ksju [112]

A consistent system has at least one solution. ... y = 7/3 * x - 2/3 is the slope intercept form of the equation 7x - 3y = 2 m = 7/3 b = -2/3 a line parallel to the line created by this equation will have the same slope but a different y-intercept.

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3 years ago

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