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qaws [65]
3 years ago
10

Which equation is equivalent to 12x + 15 = 36?

Mathematics
2 answers:
aalyn [17]3 years ago
6 0
X+15=3. And if you don’t mind, please look at my recent mathematics question because I am very desperate for an answer
Naddik [55]3 years ago
3 0
X+15=3
hope this helps
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Ted practices two types of swimming styles for a total of 50 minutes every day. he spends 20 minutes more practicing the breast
cluponka [151]

Answer:

see below

Step-by-step explanation:

butterfly = x minutes

breast = y minutes

total is 50 minutes

breast stroke = butterfly +20

Part A

x+y = 50

y = x+20

Part B

Substitute the second equation into the first

x+ (x+20) = 50

2x+20 = 50

2x+20-20 = 50-20

2x = 30

2x/2 = 30/2

x = 15

y = x+20

y = 20+15

y = 35 minutes

35 minutes on the breast stroke

Part C

45 minutes on the butterfly is not reasonable

We only have a total of 50 minutes

50-45 = 5

But he spend more time on the breast stroke ( 20 minutes more), but if he spend 45 minutes on the butterfly, he would have to spend less on the breast stroke.

4 0
3 years ago
An open box is to be constructed so that the length of the base is 3 times larger than the width of the base. If the cost to con
natta225 [31]

Answer:

Step-by-step explanation:

Let assume that the volume = 88 cubic feet

Then:

L = 3w --- (1)volume = l \times w \times h \\ \\ 88 =  (3w)   \times w  \times h \\ \\ 3w^2 h= 88 \\ \\ h = \dfrac{88}{3w^2}--- (2) \\ \\

The construction cost now is:

C = 4(l \times w) + 2 ( w  \times h) + 2(l \times h) \\ \\ C = 4(3w^2) + 2(w  \times \dfrac{88}{3w^2}) + 2(3w \times \dfrac{88}{3w^2}) \\\\ C = 12w^2 + \dfrac{176}{3w} + \dfrac{176}{w}

Now, to determine the minimum cost:

\dfrac{dC}{dw}= 0  \\ \\ \implies 24 w - \dfrac{176}{3w^2}- \dfrac{176}{w^2}=0 \\ \\ 24 w ^3 = \dfrac{176}{w^2}(\dfrac{1}{3}+1) \\ \\ 24 w ^3 = \dfrac{176(4)}{3} \\ \\ w^3 = \dfrac{88}{3(3)}

w = \dfrac{88}{3(3)}^{1/3} \ feet

Now;

length = 3 ( \dfrac{88}{3(3)})^{1/3} \ feet

height = ( 88})^{1/3} (3)^{1/3} \ feet

6 0
3 years ago
Which of the following numbers could have been rounded to 23.5? Explain how
Naddika [18.5K]

Answer:

23.49

Step-by-step explanation:

5 0
3 years ago
-6p - 21 = 3p - 12 solve the equation
grigory [225]

Answer:

p = 1

Step-by-step explanation:

-6p - 21 = 3p - 12

+6p         +6p

-21 = 9p - 12

+12        +12

9 = 9p

//////////

9     9

1 = p

p = 1

8 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST! please help! Find the measure of the indicated angle to the nearest degree.
Sunny_sXe [5.5K]

Answer:

14

Step-by-step explanation:

5 0
2 years ago
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