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Katarina [22]
3 years ago
6

Solve for x. 42-3x=30. Please and thank you! will mark brainliest!

Mathematics
2 answers:
o-na [289]3 years ago
4 0
X=4

Explanation: 42-3x=30
So you subtract 42 on each side leaving you with -3x=-12 and then you divide by -3 on each side meaning -12/-3 which leaves you with x=4



olganol [36]3 years ago
3 0

Answer:

x = 4

Step-by-step explanation:

Isolate the variable by diving each side by factors that don't contain the variable.

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AnnyKZ [126]
Expanded: 80,000,000+9,000,000+600,000+30,000+7,000+400+20+1
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Math help please im so confused
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Answer:

Angle 3 is 49 degrees

=============================

Explanation:

Angle 1 is 50 degrees and angle 2 is 48 degrees. Added up, they total to 98 degrees. This is angle DEF.

Angle DEF is congruent to angle ABC because they are alternate exterior angles and because lines m and n are parallel

We are told that angle ABC is bisected (aka cut in half) because of line s; which means that the angles labeled "4" and "5" are exactly half that of angle ABC = 98 degrees

Therefore, angle 4 is 98/2 = 49 degrees and so is angle 3 (due to angles 3 and 4 being vertical angles; angle 3 = angle 4)

4 0
3 years ago
Is the relationship between 7,742 and 7,785 different in anyway?
timurjin [86]
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5 0
3 years ago
Sal's Sandwich Shop sells wraps and sandwiches as part of its lunch specials. The profit on every sandwich is $2 and the profit
coldgirl [10]
Changing the equation into slope form: y = mx + c, where m is the slope [gradient] and c is the y-intercept.

2x+3y=1470
3y = -2x+1470
y= - \frac{2}{3}x+ \frac{1470}{3}
y=- \frac{2}{3}x+490

The gradient is - \frac{2}{3} and y-intercept is at y=490

Graphing y=- \frac{2}{3}x+490 using slope-intercept method:
a) The slope is a negative slope. The line will go 'down hill'
b) The line must pass the point (0, 490)
c) The line will intercept the x-axis at y = 0
    0 = - \frac{2}{3}x+490
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    So, x-intercept is at (735, 0)

The graph of this function is shown below. The intercepts are labelled at:
y = 490
x = 735

-----------------------------------------------------------------------------------------------------------

Next month's profit equation

2x+3y=1593

Rewriting this into slope-equation form

3y = -2x+1593
y=- \frac{2}{3}+ \frac{1593}{3}
y= - \frac{2}{3}+531

The gradient, m, equals to - \frac{2}{3}
The y-intercept, c, equals to 531

The equation still has the same gradient with last month's profit equation but different y-intercept. 

-------------------------------------------------------------------------------------------------------------

A linear graph show points of (0, 300) and (450, 0)

We work out the slope: 
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Y-intercept at x = 0, so it's at y = 300

Equation y = - \frac{2}{3}+300

6 0
3 years ago
A number is 6 greater than 1\2 another number. If the sum of the numbers is 21,find the numbers.
Lemur [1.5K]
Let 1 number equal x
<span>Let the other number equal 1/2x + 6

x + (1/2x + 6) =21
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</span>
5 0
3 years ago
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