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larisa [96]
3 years ago
5

How do work this out 15+6/2+9*3

Mathematics
1 answer:
wlad13 [49]3 years ago
6 0
PEMDAS is important

Parentheses
Exponents
Multiplication
Division
Adding
Subtracting

There's no parentheses or exponents, so the first is multiplication. 9*3 is 27. Next is division, 6/2 is 3. Next is adding.

15+3+27=45
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Answer:

Let \vec{A}=3\hat{i}-\hat{j} and \vec{B}=-\hat{i}-2\hat{j}.

a)

\vec{A}+\vec{B}=(3\hat{i}-\hat{j})+(-\hat{i}-2\hat{j})=2\hat{i}-3\hat{j}

b)

\vec{A}-\vec{B}=(3\hat{i}-\hat{j})-(-\hat{i}-2\hat{j})=4\hat{i}+\hat{j}

c) Now we calculate the direction of \vec{A}+\vec{B} and  \vec{A}-\vec{B}

We calculate the direction of \vec{A}+\vec{B} like this:

\theta=tan^{-1}(\frac{-3}{2})=-56,3^{\circ}. Since, 270\leq\theta\leq360, then the direction of \vec{A}+\vec{B} is 360^{\circ}-\theta=360^{\circ}-56.3^{\circ}=303.7^{\circ}.

Now, for \vec{A}-\vec{B}

\theta=tan^{-1}(\frac{1}{4})=14^{\circ}.

8 0
3 years ago
a package of marbles contains 20 blue marbles, 38 red marbles, 48 green marbles, and 16 yellow marbles. which color of marbles c
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the answer would be 48 green marbles

Step-by-step explanation:

48/6=8

So, each person would get 8 marbles each

7 0
3 years ago
Adam’s bank account has a balance of $1213.69 before he starts spending money. He makes the following transactions:
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Step-by-step explanation:

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5 0
3 years ago
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Let (8,−3) be a point on the terminal side of θ. Find the exact values of cosθ, cscθ, and tanθ.
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Answer:

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\text{Csc}\theta=-\frac{\sqrt{73}}{3}

\text{tan}\theta =\frac{\text{Opposite side}}{\text{Adjacent side}}=\frac{y}{x}=\frac{-3}{8}

Step-by-step explanation:

From the picture attached,

(8, -3) is a point on the terminal side of angle θ.

Therefore, distance 'R' from the origin will be,

R = \sqrt{x^{2}+y^{2}}

R = \sqrt{8^{2}+(-3)^2}

  = \sqrt{64+9}

  = \sqrt{73}

Therefore, Cosθ = \frac{\text{Adjacent side}}{\text{Hypotenuse}}=\frac{x}{R}=\frac{8}{\sqrt{73}}

Sinθ = \frac{\text{Opposite side}}{\text{Hypotenuse}}=\frac{y}{R}=\frac{-3}{\sqrt{73} }

tanθ = \frac{\text{Opposite side}}{\text{Adjacent side}}=\frac{y}{x}=\frac{-3}{8}

Cscθ = \frac{1}{\text{Sin}\theta}=\frac{R}{y}=-\frac{\sqrt{73}}{3}

6 0
4 years ago
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Answer:

36.73 (Approx) ounces use on each sandwich.

Step-by-step explanation:

As given

Noah is making grilled cheese sandwiches for friends.

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As given c is represented the  noah can use on each sandwich.

Than the equation becomes

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x = \frac{2424}{66}

x = 36.73 (Approx) ounces

Therefore 36.73 (Approx) ounces use on each sandwich.

5 0
4 years ago
Read 2 more answers
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