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3 years ago

Use properties of equality to solve the equation for w. You must show your work. 2(w+3) = −2(w−21)

Mathematics

2 answers:

Hunter-Best [27]3 years ago

8 0

Answer:

Today: Friday, 06 November 2020

Hour: 19.17 WIB (Indonesia)

_______________________________

2 (w + 3) = -2(w - 21)

2w + 6 = -2w + 42

2w + 2w = -6 + 42

4w = 36

w = 9

natta225 [31]3 years ago

3 0

Answer:

Step-by-step explanation:

2w+6=-2w+42

4w+6=42

4w=36

w=9

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At the beginning of the year, Wyatt had $40 in savings and saved an additional $14 each week thereafter. Julian started the year

Vitek1552 [10]

Answer:

4 weeks

Step-by-step explanation:

Wyatt's equation:

t=14w+40

Julian's equation:

t=19j+20

Since both equations equal the same thing, or t, we can equal them against each other as 1 equation

14t+40=19t+20

(subtract 20 from both sides)

14t+20=19t

(subtract 14t from both sides)

20=5t

(divide both sides by 5)

t=4 weeks

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3 years ago

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damaskus [11]

Answer:

Step-by-step explanation:

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3 years ago

Two objects are moving along separate linear paths where each path is described by postion, d, and time, t. The variable d is me

weqwewe [10]

The first equation is:
d = 2.5 t + 2.2
For the parallel line :
m = 2.5.
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d = m t + b
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Answer:
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3 years ago

Based on data collected from its production processes, Crosstiles Inc. determines that the breaking strength of its most popular

alexandr1967 [171]

Answer:

16% of its popular porcelain tile will have breaking strengths greater than 412.5 pounds per square inch.

Step-by-step explanation:

We are given that the breaking strength of its most popular porcelain tile is normally distributed with a mean of 400 pounds per square inch and a the standard deviation of 12.5 pounds per square inch.

Let X = the breaking strength of its most popular porcelain tile

SO, X ~ Normal( $\mu=400,\sigma^{2}=12.5^{2}$ )

The z score probability distribution for normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = mean breaking strength of porcelain tile = 400 pounds per square inch

$\sigma$ = standard deviation = 12.5 pounds per square inch

Now, probability that the popular porcelain tile will have breaking strengths greater than 412.5 pounds per square inch is given by = P(X > 412.5)

P(X > 412.5) = P( $\frac{X-\mu}{\sigma}$ > $\frac{412.5-400}{12.5}$ ) = P(Z > 1) = 1 - P(Z $\leq$ 1)