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2 years ago

How many solutions for x does the following equation have? 2(x + 4) − 1 = 2x + 7

Mathematics

1 answer:

4vir4ik [10]2 years ago

8 0

Answer:

The equation has infinity solutions

Step-by-step explanation:

we have

$2(x+4)-1=2x+7$

Applying distributive property left side

$2x+8-1=2x+7$

Combine like terms

$2x+7=2x+7$

The linear equation of the left side is equal to the linear equation of the right side

Both lines are identical

therefore

Is a consistent dependent system

The equation has infinity solutions

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Niko wants to buy a bicycle that costs $145. He has already saved $25. He says that he can determine the amount he still needs t

nevsk [136]

145 - 25 = b
b = 120

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2 years ago

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Steve drove at a constant rate to the beach for a vacation. In the equation below, t is the time in hours it took Steve to drive

Sindrei [870]

9514 1404 393

Answer:

A. 64 miles per hour

Step-by-step explanation:

In a linear equation, the "unit rate" is generally the coefficient of the variable. The units of the unit rate depend on the definition of the relationship.

Here, the time t is in hours, so the "unit rate" will be <something> per hour. The answer choices suggest that the <something> is "miles". That is, the units of the equation are ...

(miles/hour) × (hours) = miles

With numbers/variables, that is ...

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2 years ago

The points -4. -4 -4, 4

Ilia_Sergeevich [38]

Answer:

whats the question?

Step-by-step explanation:

I don't get the question so what is the question?

3 0

2 years ago

Laura drove 638 miles in 11 hours at the same rate how long would it take her to drive 406 miles

shusha [124]

Answer:

Step-by-step explanation:

This is a d = rt problem; but since it is linear, then proportions will work too. Set up the proportion with miles on top and hours on the bottom:

$\frac{miles}{hrs}:$

Then put the numbers in where they go, keeping in mind that miles goes with miles and hours goes with hours in the ratios, and that our unknown is time (hours):

$\frac{miles}{hrs}:\frac{638}{11}=\frac{406}{x}$ and cross multiply to solve:

638x = 4466 so

x = 7 hrs

6 0

2 years ago

If p(a) = 0.50, p(b) = 0.60, and p(a intersection

bogdanovich [222]

Use the identity P(A ∪ B) = P(A)+P(B)-P(A ∩ B)

P(A)=0.50
P(B)=0.60
P(A ∪ B) = 0.30
=>
P(A ∪ B) = P(A)+P(B)-P(A ∩ B)
=(0.50+0.60)-0.30
=0.80

5 0

2 years ago