Solve: 7 - 2x = 2 (x - 4) - 1

Mathematics

1 answer:

ipn [44]2 years ago

6 0

The answer is D!
Hope this helps

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Read 2 more answers

Solve the inequality for x in terms of a. Ax - 8 less than or equal to 12

Westkost [7]

Answer:

$\large\boxed{\left\{\begin{array}{ccc}x\leq\dfrac{20}{a}&\text{for}\ a>0\\\\x\geq\dfrac{20}{a}&\text{for}\ a$

Step-by-step explanation:

$ax-8\leq12\qquad\text{add 8 to both sides}\\\\ax-8+8\leq12+8\\\\ax\leq20\qquad\text{divide both sides by}\ a\neq0\\\\(1)\ \text{if}\ a>0,\ \text{then:}\\\\x\leq\dfrac{20}{a}\\\\(2)\ \text{if}\ a$

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2 years ago

To complete

natulia [17]

To figure this question out, we first need to figure out how much one pound of potatoes costs. To do this, we need to divide 18 by 8, and in this, we get $2.25. Then, we have to multiply this by 15 to find out how much 15 pounds of potatoes costs. This gives us $33.75, which is our answer to this question.

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3 years ago

Geometry help will give brainliest

MrRissso [65]

Problem 1
=========
Write an equation for line passing through (8,12) that is perpendicular to
y = (4/3)x - 5

Note:
When two lines are perpendicular, the product of their slopes is -1.

The slope of the given line is 4/3.
Therefore the slope of the perpendicular line is -3/4.
Let the equation of the perpendicular line be
y = -(3/4)x + c
Because the line passes through (8,12), therefore
-(3/4)*8 + c = 12
-6 + c = 12
c = 18
The equation is y = -(3/4)x +18

Answer: $y= -\frac{3}{4} x + 18$

Problem 2
=========
Write an equation for a line passing through (-30,7) that is perpendicular to
y = -3x - 5.

The perpendicular line will have a slope of 1/3. Let its equation be
y = (1/3)x + c
Because the line passes through (-30,7), therefore
(1/3)*(-30) + c = 7
-10 + c = 7
c = 17
The equation is y = (1/3)x + 17

Answer: $y = \frac{1}{3} x + 17$

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3 years ago