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3 years ago

5

The costume store needed 16 yards of fabric to make 5 witch's costumes. For this Halloween the store received orders for 105 wit

ch's costumes. How much fabric is needed?

1 answer:

butalik [34]3 years ago

7 0

336

Step-by-step explanation:

because if the store needed 16 yards of fabric to make 5 witch's costumes then for 105 the store need 336 yards

so it's 105÷5=21 then

21×16=336 that's it

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enot [183]

(f.g)(x) = f (g(x))= f ( x^4+3)

= (x^4+3)^2 + 2 ( x^4+3) - 6

= x^8 + 9 + 6x^4 + 2x^4 + 6-6

= x^8 + 8x^4+9

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3 years ago

How do you solve the equation 7^(7n+7)=2,401

RoseWind [281]

7^(7n + 7) = 2401
apply log on both sides to solve the equation
log 7^(7n + 7) = log 2401
the power is brought forward
(7n + 7) log 7 = log 2401
7n +7 = log 2401 / log 7
7n + 7 = 4
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Hope it helped!

5 0

3 years ago

Please help me...I will give brainliest. Please dont answer if you dont know. I really need this. Thankyou have a good day:)

enyata [817]

Answer:

7: 45.2 (rounded from 45.21)

8: 114.5 (rounded from 114.45)

9: 115.9 (rounded from 115.86)

10: 105.6 (rounded from 105.56)

and of course the unit is cm3

Step-by-step explanation:

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3 years ago

Which of the following are solutions to the equation sinx cosx = (sqrt of 3)/4? Check all that apply.

Dmitriy789 [7]

$\sin x \cos x = \dfrac{\sqrt 3}{4}$

$2 \sin x \cos x = \dfrac{\sqrt 3}{2}$

$\sin 2x = \sin \frac \pi 3$

$2x = \frac \pi 3 + 2 \pi n \textrm{ or } 2x = (\pi - \frac \pi 3) + 2 \pi n \quad \textrm{integer } n$

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Choices A and C

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3 years ago

Julio bought 4 pencils and 3 erasers for $0.37 and David paid $0.33 for 3 pencils and 4 erasers. What is the cost of one pencil?

grigory [225]

cost of pencil = x = 0.07

and cost of eraser = y = 0.03

Step-by-step explanation:

let cost of pencil = x

and cost of eraser = y

So, we have equations:

$4x+3y=0.37\\3x+4y=0.33$

Solving both equations to find value of x and y

Let:

$4x+3y=0.37\,\,\,eq(1)\\3x+4y=0.33\,\,\,eq(2)$

Multiply eq(1) with 4 and eq(2) with 3 and subtract

$16x+12y=1.48\\9x+12y=0.99\\-\,\,\,-\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,-\\--------\\7x=0.49\\x=0.07$

Putting value of x in equation 1:

$4x+3y=0.37\\4(0.07)+3y=0.37\\0.28+3y=0.37\\3y=0.37-0.28\\3y=0.09\\y=0.03$

So, x= 0.07 and y = 0.03

cost of pencil = x = 0.07

and cost of eraser = y = 0.03

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

4 0

3 years ago