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tensa zangetsu [6.8K]
2 years ago
12

HELP PLEASE I NEED HELP!​

Mathematics
1 answer:
wel2 years ago
7 0

Answer:

3X+1 + 11X-4 + 5X-7 = 180

19X = 190

X=10

Step-by-step explanation:

Good luck ^_^

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Please solve all of the questions!! GIVING BRAINLIEST
Ad libitum [116K]

Answer:

yes

Step-by-step explanation:

7 0
2 years ago
Vector u has a magnitude of 7 units and a direction angle of 330°. Vector v has magnitude of 8 units and a direction angle of 30
Dafna11 [192]
Keeping in mind that x = rcos(θ) and y = rsin(θ).

we know the magnitude "r" of U and V, as well as their angle θ, so let's get them in standard position form.

\bf u=
\begin{cases}
x=7cos(330^o)\\
\qquad 7\cdot \frac{\sqrt{3}}{2}\\
\qquad \frac{7\sqrt{3}}{2}\\
y=7sin(330^o)\\
\qquad 7\cdot -\frac{1}{2}\\
\qquad -\frac{7}{2}
\end{cases}\qquad \qquad v=
\begin{cases}
x=8cos(30^o)\\
\qquad 8\cdot \frac{\sqrt{3}}{2}\\
\qquad \frac{8\sqrt{3}}{2}\\
y=8sin(30^o)\\
\qquad 8\cdot \frac{1}{2}\\
\qquad 4
\end{cases}

\bf u+v\implies \left( \frac{7\sqrt{3}}{2},-\frac{7}{2} \right)+\left( \frac{8\sqrt{3}}{2},4 \right)\implies \left( \frac{7\sqrt{3}}{2}+\frac{8\sqrt{3}}{2}~~,~~ -\frac{7}{2}+4\right)
\\\\\\
\left(\stackrel{a}{\frac{15\sqrt{3}}{2}}~~,~~  \stackrel{b}{\frac{1}{2}}\right)\\\\
-------------------------------

\bf tan(\theta )=\cfrac{b}{a}\implies tan(\theta )=\cfrac{\frac{1}{2}}{\frac{15\sqrt{3}}{2}}\implies tan(\theta )=\cfrac{1}{15\sqrt{3}}
\\\\\\
\measuredangle \theta =tan^{-1}\left( \cfrac{1}{15\sqrt{3}} \right)\implies \measuredangle \theta \approx 2.20422750397203^o
8 0
2 years ago
Point (-4,-8) Reflected across the y-axis
nekit [7.7K]

Answer:

(4,-8)

Step-by-step explanation:

Where is the point on the opposite side of the y-axis?

The answer would be (4, -8)

5 0
2 years ago
Office supplies had a normal starting balance of $75. there were debit postings of $80 and credit postings of $60 during the mon
Katena32 [7]

Answer:

I think it’s 95 debit but it could be credit

Step-by-step explanation:

75 + 80 = 155

155 - 60 = 95

5 0
3 years ago
Find the axis of symmetry and the vertex of the graph of f(0) = 4x^2 - 8x +3.
olganol [36]

Answer:

Vertex: (1,-1)

Symmetry: x = 1

Step-by-step explanation:

y = 4x² - 8x + 3

y = 4(x² - 2x) + 3

y = 4[x² - 2(x)(1) + 1² - 1²] + 3

y = 4(x - 1)² - 1

In y = a(x - h)² + k,

(h,k) is the vertex

And a vertical line passing through the vertex is the line of symmetry, i.e x = h.

Vertex: (1,-1)

Symmetry: x = 1

6 0
2 years ago
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