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3 years ago

-185 = -5 - 9b How to find the answer to this problem above?

Mathematics

1 answer:

balu736 [363]3 years ago

4 0

Answer:

b=20

Step-by-step explanation:

-185-5=9b

-180=9b

=>b= -20

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Angle between two lines What is the size of the angle between the two lines 3x-2y+1=0 and x-3y=0 (answer in degrees and minutes)

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3 years ago

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mestny [16]

Answer:

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3 years ago

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One number is 44 times a first number. a third number is 100 more than the first number. if the sum of the three numbers is 5385

svlad2 [7]

I take it that the actual total is 538. If it really is 538538 leave me a note.

Let the first number = x

Let the second # = 44x

Let the third # = 100x

Equation

x + 44x + 100x = 538 Add the left side. All terms are part of the total.

145x = 538 Div By 145

x = 538/145

x = 3.71

Check

First number = 3.71

Second # = 44*3.71 = 163.24

Third number = 100*3.71 = 371

Total these 3 numbers 537.95 The very tiny difference is due to rounding.

5 0

3 years ago

What is the length of SA? 1.89 ft 2.43 ft O 3 ft 7 ft

Brums [2.3K]

Incomplete Question, Figure is not there the required figure is attached below.

Answer:

The Correct option is third one 3 ft.

Therefore length of SA is 3 ft.

Step-by-step explanation:

Given:

BS = 10 ft

BT = 9ft

TC = 2.7 ft

TS || CA

To Find:

SA = ?

Solution:

Basic Proportionality Theorem:

Basic Proportionality Theorem States that "If a line is drawn parallel to one side of a triangle to intersect the other two sides in distinct points, the other two sides are divided in the same ratio".

Here, TS || CA ......Given:

$\dfrac{BS}{SA}=\dfrac{BT}{TC}$ ...Basic Proportionality Theorem

Substituting the values we get

$\dfrac{10}{SA}=\dfrac{9}{2.7}\\\\SA=\dfrac{27}{9}=3\\\\\therefore SA =3\ ft$

Therefore the length of SA is 3 ft.

5 0

3 years ago

Which of the following points is a solution to the system of equations x - y = 1 and -x + 3y = - 7?

kiruha [24]

Answer:

(-2,-3)

Step-by-step explanation:

Put the equations over each other.

$\binom{x - y = 1}{ - x + 3y = - 7 }$

Subtract the x values.

$\binom{ - y = 1}{3y = - 7}$

Subtract on both sides.

$2y = - 6$

Divide on both sides.

$y = - 3$

Insert the y value into one of the equations.

$x - ( - 3) = 1$

Get rid of the parenthesis.

$x + 3 = 1$

Subtract on both sides.

$x = - 2$

You could also individually plug in each solution into both equations to see if they are true.

7 0

2 years ago