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hodyreva [135]
4 years ago
10

How u solve this problem 7x-y=6 -7x+y=-6

Mathematics
1 answer:
slava [35]4 years ago
4 0

\underline{+\left\{\begin{array}{ccc}7x-y=6\\-7x+y=-6\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad0=0\\\\\text{Infinitely many solutions}\\\\\left\{\begin{array}{ccc}x\in\mathbb{R}\\y=7x-6\end{array}\right

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Simplify (4/5)^-2. Show your work!<br> PLEASE HELP ASAP! 40 POINTS!
Olenka [21]

Answer: (16/25)

Step-by-step explanation: That's -(4/5) x -(4/5) = (16/25). It's that answer because a negative times a negative equals a positive. The exponent in the problem is telling you to multiply -4/5 times itself 2 times.

5 0
3 years ago
In ΔTUV, the measure of ∠V=90°, the measure of ∠T=16°, and VT = 4.9 feet. Find the length of TU to the nearest tenth of a foot.
RSB [31]

<u>Given</u>:

Given that TUV is a right triangle.

The measure of ∠T is 16°

The length of VT is 4.9 feet.

We need to determine the length of TU.

<u>Length of TU:</u>

The length of TU can be determined using the trigonometric ratio.

Thus, we have;

cos \ \theta=\frac{adj}{hyp}

where \theta=16^{\circ}, adj = TV and hyp = TU

Thus, we get;

cos \ 16^{\circ}=\frac{4.9}{TU}

Simplifying, we get;

TU=\frac{4.9}{cos \ 16^{\circ}}

TU=\frac{4.9}{0.9613}

TU=5.097

Rounding off to the nearest tenth, we get;

TU=5.1

Thus, the length of TU is 5.1 feet.

6 0
3 years ago
Can someone please help i will mark brainliest
marysya [2.9K]

Since f(2) is not given in the function definition, you must use f(n) with n=2. That tells you

... f(2) = -29 -f(1)

Now, f(1) is defined, so use that value.

... f(2) = -29 -(-16) = -29 +16

... f(2) = -13

7 0
3 years ago
Please help for 16 points <br>NO WRONG ANSWERS PLEASE ​
Sedbober [7]

Answer:

x = 30, x = 5 and x = 9

Step-by-step explanation:

The diagonals of a square are perpendicular bisectors of each other, so

∠ AEB = 90° , then

3x = 90 ( divide both sides by 3 )

x = 30

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

(9)

The 4 angles of a square are right and the diagonals bisect the angles, then

∠ BAC = 45° , so

9x = 45 ( divide both sides by 9 )

x = 5

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

(10)

All sides are congruent , so

CD = AB , that is

3x - 5 = 2x + 4 ( subtract 2x from both sides )

x - 5 = 4 ( add 5 to both sides )

x = 9

5 0
3 years ago
What does 270 and 3000 have in common
FromTheMoon [43]
They are both multiples of 3

6 0
4 years ago
Read 2 more answers
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