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Diano4ka-milaya [45]
3 years ago
15

What is the value of a in the equation 5a-10b=45 when b=3

Mathematics
2 answers:
valentina_108 [34]3 years ago
7 0
Since b = 3 the equation changes

5a - 10(3) = 45
5a - 30 = 45

(Add 30 to both sides)
5a = 75
Divide 5 to both sides
a = 15
spin [16.1K]3 years ago
6 0
If you would like to solve the equation 5 * a - 10 * b = 45, when b = 3, you can calculate this using the following steps:

b = 3
5 * a - 10 * b = 45
5 * a - 10 * 3 = 45
5 * a - 30 = 45
5 * a = 45 + 30
5 * a = 75       /5
a = 75 / 5
a = 15

Result: The value of a is 15.
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If y varies directly as x and inversely as z, and y = 32 whe x = 4 and z = 6, find y when x = 10 and z = 26
LuckyWell [14K]

The value of y is 18.46 when x=10 and z = 26

Step-by-step explanation:

The direct proportion is denoted as:

y∝x

And the inverse proportion will be denoted as:

y∝1/z

combining both

y∝ x/z

When the symbol of proportionality is removed, the proportionality constant is introduced

y = k\frac{x}{z}

Given

y = 32 when x=4 and z = 6

Putting the values

32 = k * \frac{4}{6}\\k = 32 * \frac{6}{4}\\k = 8*6\\k = 48

So the equation will become:

y = 48* \frac{x}{z}

Putting x=10 and z= 26

y = 48 * \frac{10}{26}\\y = \frac{480}{26}\\y = 18.4615

Hence,

The value of y is 18.46 when x=10 and z = 26

Keywords: Proportion, variation

Learn more about proportion at:

  • brainly.com/question/4054269
  • brainly.com/question/4163549

#LearnwithBrainly

8 0
3 years ago
Circle O has radius 5 m with an arc AB intercepted by a central angle of π5π5 radians. What is the length of arc AB expressed in
balu736 [363]

Answer:

I am assuming that you meant to write π/5.

Step-by-step explanation:

Radius r = 5 meters

Circumference = 2πr = 10π

Central angle θ = π/5 radian

Arc length = 10π × θ/(2π radians)

= 5θ

= π meters

6 0
2 years ago
Calculate the percentage increase or decrease in each of
horrorfan [7]

Step-by-step explanation:

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5 0
2 years ago
Does anyone know this
Alika [10]
They both have red white and blue is this is not the right answer I am sorry I cannot see if this is multiple choice.
pipermr

8 0
3 years ago
1- Emily collected $950 selling Girl Scout cookies all day Saturday. Emily's Troop collected 10 times as much as she did. How mu
VikaD [51]
1. $9500 because 10*950=9500
2. $95 because 950/10=95

( can explain further )
5 0
2 years ago
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