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a_sh-v [17]
3 years ago
15

What is the value of x in the equation 4x+8y=40 when y = 0.8

Mathematics
1 answer:
fgiga [73]3 years ago
8 0

When y=0.8

4x +8(0.8) =40

-> 4x +6.4 =40

-> 4x = 33.4

-> x=33.4/4

-> x=8.35

Hope it helps...

Regards;

Leukonov/Olegion.

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M/n=p-6 what is n how to solve
madreJ [45]
M/n=p-6
n= m/(p-6)
i swapped the n and p-6
4 0
3 years ago
A. 3 <br>B. 10<br>C. 20<br>D. 30​
Dahasolnce [82]

<u>Answer:</u>

<h2>D. 30</h2>

<u>Explanation:</u>

292/100×9.9 = 2.92×9.9 = <u>28.908</u>

30 is closest to 28.908

3 0
2 years ago
Verify the identity by transforming the left-hand side into the right-hand side.
qaws [65]
<span>(1 + cos² 3θ) / (sin² 3θ) = 2 csc² 3θ - 1

Starting with the left:  Note that  cos²θ + </span><span>sin²θ = 1.
In the same way:    </span><span>cos²3θ + <span>sin²3θ = 1
</span></span>Therefore                cos²3θ  = 1 - <span>sin²3θ
</span> From the top:  (1 + cos² 3θ) = 1 + 1 - sin²3θ = 2 - <span>sin²3θ
</span>
(1 + cos² 3θ) / (sin² 3θ) = (<span>2 - sin²3θ) / (sin² 3θ) = 2/</span><span>sin² 3θ - </span><span>sin²3θ/</span>sin²3θ

=  2/<span>sin² 3θ - 1;        But 1/</span><span>sinθ = csc</span><span>θ,  Similarly  </span>1/sin3θ = csc3θ

= 2 *(1/sin<span>3θ)²  - 1</span>
= 2csc²3θ  - 1.        Therefore  LHS = RHS.  QED.

8 0
3 years ago
Zmień jednostki prose o pomoc
Len [333]

Answer:

42300000

Step-by-step explanation:

Use known fact

1\ km=1000\ m

Consider 1 square kilometer:

1\ km^2=1\ km\times 1\ km=1000\ m\times 1000\ m=1000000\ m^2

So, to find the answer, you have to multiply given number of square kilometers by 1000000:

42.3\ km^2=42.3\times 1000000\ m^2=42300000\ m^2

4 0
3 years ago
Juanita and Keenan own a camping supply store and just put in an order for flashlights and sleeping bags. The number of flashlig
julsineya [31]

Juanita and Keenan ordered 85 flashlights and 17 sleeping bags.

Step-by-step explanation:

Given,

Cost of each flashlight = $12

Cost of each sleeping bag = $45

Total cost = $1785

Let,

x represent the number of flashlights ordered

y represent the number of sleeping bags ordered

According to given statement;

12x+45y=1785    Eqn 1

x = 5y    Eqn 2

Putting value of x from Eqn 2 in Eqn 1

12(5y)+45y=1785\\60y+45y=1785\\105y=1785\\

Dividing both sides by 105

\frac{105y}{105}=\frac{1785}{105}\\y=17

Putting y=17 in Eqn 1

x=5(17)\\x=85

Juanita and Keenan ordered 85 flashlights and 17 sleeping bags.

Keywords: linear equation, substitution method

Learn more about substitution method at:

  • brainly.com/question/12878495
  • brainly.com/question/12884757

#LearnwithBrainly

8 0
3 years ago
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