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3 years ago

2(a+7) - 7 = 9 what is the answer

Mathematics

1 answer:

REY [17]3 years ago

7 0

Answer:

The answer is 1

Step-by-step explanation:

2(a+7)−7=9

Step 1: Simplify both sides of the equation.

2(a+7)−7=9

(2)(a)+(2)(7)+−7=9(Distribute)

2a+14+−7=9

(2a)+(14+−7)=9(Combine Like Terms)

2a+7=9

Step 2: Subtract 7 from both sides.

2a+7−7=9−7

2a=2

Step 3: Divide both sides by 2.

a=1

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ss7ja [257]

Answer: $(13.22\%,\ 19.34\%)$

Step-by-step explanation:

Given : Sample space : n= 559

Sample proportion : $\hat{p}=\dfrac{91}{559}=0.162790697674\approx0.1628$

$=16.28\%$

Significance level : $\alpha= 1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Confidence level for population proportion:-

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.1628\pm (1.96)\sqrt{\dfrac{0.1628(1-0.1628)}{559}}\\\\=0.1628\pm0.030604971367\\\\\approx 0.1628\pm0.0306=(0.1322,\ 0.1934)=(13.22\%,\ 19.34\%)$

Hence, 95% confidence interval for the percentage of all auto accidents that involve teenage drivers.= $(13.22\%,\ 19.34\%)$

7 0

3 years ago

Nora is in the business of manufacturing phones. She must pay a daily fixed cost to rent the building and equipment, and also pa

vaieri [72.5K]

9514 1404 393

Answer:

c = 150p + 1000

Step-by-step explanation:

We know the variable cost is 150 per phone, so the total cost will be ...

c = 150p +b . . . . for some value b

We also know the value of c for 8 phones, so we can find b:

2200 = 150(8) + b

2200 -1200 = b = 1000

Then the desired equation is ...

c = 150p + 1000

5 0

2 years ago

5g⁴- 5g³ + 20g² - 20g<br> factor the polynomial

Alina [70]

Answer:

5g⁴- 5g³ + 20g² - 20g

5g(g³-g²+4g-4)

5g(g²(g-1)+4(g-1))

5g(g-1)(g²+4)

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2 years ago

Read 2 more answers

Simplify the expression. 8(s-1)

TEA [102]

Answer:

8s-8

Step-by-step explanation:

Use the distributive property: #(a-b) = #*a - #*b. In this case 8s - 8.

Hope it helps!

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2 years ago

Read 2 more answers

BRAINLIEST MATH okurttttt

Zepler [3.9K]

In the given question, $\sqrt{x-1}$ is shifted one unit to the right of $\sqrt{x}$

So, Option C is correct.

Step-by-step explanation:

The parent function is $\sqrt{x}$ and transformed function is $\sqrt{x-1}$

So, Parent Function: $\sqrt{x}$

Transformed Function: $\sqrt{x-1}$

If transformed function is of type: g(x) = f(x-h), then the graph is shifted to right h units.

So, In the given question, $\sqrt{x-1}$ is shifted one unit to the right of $\sqrt{x}$

So, Option C is correct.

Keywords: Transformations

Learn more about Transformations at:

#learnwithBrainly

4 0

3 years ago