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2 years ago

What is the solution 4x-7y=13 2x-7y=3

Mathematics

2 answers:

Alex73 [517]2 years ago

5 0

Add the common like terms to get 6x -14y = 16 hope this helped

agasfer [191]2 years ago

4 0

Solve by Substitution, Addition, or Elimination?

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The value of a car with an initial purchase price of $15,250 depreciates by 16% per year. How much is the car worth after 6 year

Scrat [10]

Answer:

$13842.43

Step-by-step explanation:

Given data

Value of car=$15,250

Rate of depreciation= 16%

Time = 6 years

We can use the exponential function below to model the value of the car after 6 years

v(t)= a(r)^x

But r= 1-0.016----------Because the value is depreciating

a=15,250

r=0.016

x=6

Substitute

v(t)= 15250(1-0.016)^6

v(t)= 15250(0.984)^6

v(t)= 15250*0.9077

v(t)= $13842.43

Hence the value will be $13842.43 after 6 years

8 0

2 years ago

The price of a video game was reduced from $70.00 to $40.00. By what percentage was the price of the

Sauron [17]

Answer:

43%

Step-by-step explanation:

(40-70) ÷ 70 = -30 ÷ 70 = -0.43 or -43%

Answer: The video game was reduced by 43%.

3 0

2 years ago

Fill in the Blank:

arsen [322]

Answer:

The exponent of the second term (b) starts with 0 (b0 = 1) and then increases by one in each following term until it is equal to the exponent of the binomial (5).

Step-by-step explanation:

6 0

2 years ago

What is the area of a piece of plywood that is 8 2/5 feet by 3 1/8 feet

lesya [120]

The answer would be 26.25

3 0

2 years ago

Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of education the students r

BaLLatris [955]

<h2>Answer with explanation:</h2>

Let p be the population proportion of parents who had children in grades K-12 were satisfied with the quality of education the students receive.

Given : Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of education the students receive.

Set hypothesis to test :

$H_0: p=0.39\\\\H_a :p\neq0.39$

Sample size : n= 1055

Sample proportion : $\hat{p}=\dfrac{466}{1055}=0.441706161137\approx0.44$

Critical value for 95% confidence : $z_{\alpha/2}=1.96$

Confidence interval : $\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

$0.44\pm (1.96)\sqrt{\dfrac{0.39(1-0.39)}{1055}}\\\\0.44\pm0.0299536805135\\\\0.44\pm0.03\\\\=(0.44-0.03, 0.44+0.03)\\\\=(0.41,\ 0.47)$

Since , Confidence interval does not contain 0.39.

It means we reject the null hypothesis.

We conclude that 95% confidence interval represents evidence that parents' attitudes toward the quality of education have changed.

8 0

2 years ago