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Wittaler [7]
3 years ago
15

Please help me out.I need the answer

Mathematics
1 answer:
Alchen [17]3 years ago
5 0
Hector accidentally subtracted -2x from 7x instead of adding it. Therefore, in step 2, the correct equation should be

9x = 15
You might be interested in
The quotient of x and 6.
vovikov84 [41]

The answer is 1/6. To solve, simply set up an equation. It will be x/6. As you know, x can stand for anything. 1 will be the reasonable number for variable, x. Why? Well since x=1x. You don't actually write "1" Hope this makes your understanding clear.

4 0
3 years ago
Find the value of 2cosx+1=0;0 less than x less than 360°
ohaa [14]

Answer:

120°; 240°

Step-by-step explanation:

Let's first solve for cosx: 2cosx=-1 \rightarrow cosx=-\frac12 At this point it's just a matter of drawing a circle, and mark where the angle is(please excuse my paint skills, but free hand drawing would be even worse). Red line, is -\frac12 on the cosines, and both the green and blue lines are valid solutions. The green line is a quarter of a circle, plus 30°, or 120°. The blue one is 3/4 of a circle, minus 30 degrees, or 240°.

7 0
3 years ago
The perimeter of a rectangular flower garden is 66m and its area is 272m^2. Find the length of the garden.
ExtremeBDS [4]
So we have lengths a and b and are given:

2a+2b = 66 => a+b = 33 => a= 33-b
a*b = 272

plug in one into the other:

(33-b)b = 272 => -b^2 +33b - 272 = 0

Can be factored as (b-16)(b-17) = 0, if you don't "see" this immediately, use the well known abc formula to find b.

So a=16 and b=17 or vice versa.


6 0
3 years ago
Sm1 please help me w this question!!!
Lady_Fox [76]

Answer:

The answer is A, (1,2).

Step-by-step explanation:

Hope this helps!

8x-4(x+1) = 0

x =1

y = 1 + 1

y = 2

(x,y) = (1,2)

2 = 1 + 1

8 x 1 - 4 x 2 = 0

Simplify

2 = 2

0 = 0

Solution = (1 , 2)

6 0
3 years ago
4. a. On the grid, draw at least three different quadrilaterals that can each be
Julli [10]

Answer:

this is just for part A sorry i dont get part B

oof bad drawing of a trapezoid

4 0
3 years ago
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