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telo118 [61]
3 years ago
13

Combine like terms and apply the distributive property to create an equivalent expression:

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
6 0

Answer:

Equivalent expression is 15a+8b

Step-by-step explanation:

Given expression is,

2\left(5a+3b\right)+5a+2b

First step is to apply distributive property. The property states that,

a\left(b+c\right)=ab+ac

Applying the property,

2\left(5a\right)+2\left(3b\right)+5a+2b

Simplifying,

10a+6b+5a+2b

Collecting like terms,

10a+5a+6b+2b

Combining the like terms,

15a+8b

Therefore, equivalent expression is 2\left(5a+3b\right)+5a+2b=15a+8b

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X/5+7=3<br> tellme fastplease
Aliun [14]

Answer:

-20

Step-by-step explanation:

x/5=3-7

x/5=-4

x=-4×5

x=-20

5 0
2 years ago
A random sample of 100 automobile owners in thestate of Virginia shows that an automobile is driven onaverage 23,500 kilometers
Anastaziya [24]

Answer:

a) 22497.7 < μ< 24502.3

b)  With 99% confidence the possible error will not exceed 1002.3

Step-by-step explanation:

Given that:

Mean (μ) = 23500 kilometers per year

Standard deviation (σ) = 3900 kilometers

Confidence level (c) = 99% = 0.99

number of samples (n) = 100

a) α = 1 - c = 1 - 0.99 = 0.01

\frac{\alpha }{2} =\frac{0.01}{2}=0.005\\ z_{\frac{\alpha }{2}}=z_{0.005}=2.57

Using normal distribution table, z_{0.005 is the z value of 1 - 0.005 = 0.995 of the area to the right which is 2.57.

The margin of error (e) is given as:

e= z_{0.005}\frac{\sigma}{\sqrt{n} }  = 2.57*\frac{3900}{\sqrt{100} } =1002.3

The 99% confidence interval = (μ - e, μ + e) = (23500 - 1002.3, 23500 + 1002.3) =  (22497.7, 24502.3)

Confidence interval = 22497.7 < μ< 24502.3

b) With 99% confidence the possible error will not exceed 1002.3

5 0
3 years ago
Cole bought a cutting board online. It cost $23 plus 10% shipping and handling. What was the total cost?
Rashid [163]
Cole would pay $25.30 
Because 23/10=2.3
2.3+23=25.3
Hope this helped
3 0
3 years ago
2 equivalent rations for 6/5 ? please help !!!
quester [9]
Answer: 12/10 and 24/20
Explanation if you simplify these fractions it’s becomes 6/5
7 0
3 years ago
Can someone at least help me with 2 4 and 6 please ?
irina1246 [14]
2) (-3,-2) (-2,-1) (-1,-3)

4) (3,2) (1,0) (5,0)

6) (3,2) (4,0) (2,-2)
4 0
3 years ago
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