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3 years ago

3 + 4 X 3-3 X 5 What is the answer

Mathematics

1 answer:

Svetlanka [38]3 years ago

3 0

Remember the Rules of Operations (PEDMAS):

Parentheses

Exponents

Multiplication

Division

Addition

Subtraction

So with the expression 3 + 4 x 3 - 3 x 5 we know to multiply first. So let's multiply 4 x 3 and -3 x 5 first:

3 + 4 x 3 - 3 x 5

= 3 + 12 - 15

Then let's work out the rest of the expression!

3 + 12 - 15

= 15 - 15

= 0

Therefore we can determine that 3 + 4 x 3 - 3 x 5 = 0

I hope this helped! :)

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Trigonometry Trigonometric Functions Given: Sec θ = (7/2), Find: Cos θ

Anettt [7]

Answer:

Cos θ = (2/7)

Step-by-step explanation:

Secant is just the inverse of cosine

3 0

4 years ago

Read 2 more answers

-5x+y+-2 -3x+6y= -12 solve for x and y

shtirl [24]

Step-by-step explanation:

y+6y-2= -12

7y-2 = -12-2

7y. = -14

7y/7y = -14/7y

y = -2

-5x+-3x

-8x-2-2= -12

-8x -4= -12-4

-8x = -16

-8x/-8x = -16/-8x

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7 0

3 years ago

Solve by the method of your choice 6x-2y= 16, 5x+y=24

Soloha48 [4]

6x-2y=16
(5x+y=24)*2
__________

6x-2y=16
10+2y=48 Add the equations”+”
—-
16x=64
X=4
So y=1

6 0

3 years ago

Find the surface area of the regular pyramid

love history [14]

Greetings from Brazil!

$4\dfrac{1}{2} =\dfrac{9}{2}$

$Af1=\dfrac{b\cdot h}{2} \cdot 4\\\\\\Af1=\dfrac{\dfrac{9}{2} \cdot 4}{2} \cdot 4\\\\\\Af1=\dfrac{\dfrac{36}{2} }{2} \cdot 4\\\\\\Af1=\dfrac{18}{2} \cdot 4\\\\Af1=9\cdot 4\\\\Af1=36~m^2$

$Af2=l^2\\\\Af2=(\dfrac{9}{2})^2\\\\\ Af2=\dfrac{81}{4}\\\\Af2=20,25~m^2$

$At=Af1+Af2\\At=36+20,25\\At=56,25~m^2$

I hope I helped you! =)

6 0

3 years ago

The sum of a number and twice another number is 17. The sum of twice the first number and the second number is 4. What are the t

zhannawk [14.2K]

Step-by-step explanation:

Given that,

a + 2b = 17

Also,

2a + b = 4

By adding the above expressions we get,

a + 2b + 2a + b = 17 + 4

3a + 3b = 21.

3 (a + b) = 21

a + b = 21/3

a + b = 7 Let us take 'b' = 10

a + 10 = 7

a = 7 - 10

a = -3

Now let's check by verifying by putting a = -3 and b = 10 in the previous expressions

a + 2b = 17

-3 + (2 × 10) = 17

-3 + 20 = 17

17 = 17

2a + b = 4

(2 × -3) + 10 = 4

-6 + 10 = 4

4 = 4

Therefore, a = -3 and b = 10 [(-3,10)] is the solution.

8 0

3 years ago