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3 years ago

11

Drew weekly allowance is $8.00. Jan weekly allowance is $10.00. Drew spends $3 a week and Jan spends $4 a week. Write 2 expressi

ons to show how much money each person has at the end of the week. Use parentheses.

1 answer:

Nikolay [14]3 years ago

5 0

Answer:

jan $10-$4

drew $8-3$

Step-by-step explanation:

Drew has 8 and spend 3 so ($8-3$)

Jan has 10 and spend 4 so ($10-$4)

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In April, The Kazbaas drove 760 miles in their tour van.

DedPeter [7]

9514 1404 393

Answer:

£135.98

Step-by-step explanation:

$(760\text{ mi})\dfrac{1\text{ gal}}{29.5\text{ mi}}\cdot\dfrac{4.55\text{ L}}{1\text{ gal}}\cdot\dfrac{\pounds1.16}{1\text{ L}}=\dfrac{760\cdot4.55\cdot\pounds1.16}{29.5}\\\\=\boxed{\pounds135.98}$

It cost £135.98 for petrol in April.

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2 years ago

If a man walks 150m down the street, stops to ask for directions, then walks 1 point

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180, is the answer because when I had a question like that you have to add

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3 years ago

Find the numbers b such that the average value of f(x) = 7 + 10x − 9x2 on the interval [0, b] is equal to 8.

barxatty [35]

Answer:

The numbers $b$ such that the average value of $f(x) = 7 +10\cdot x - 9\cdot x^{2}$ on the interval [0, b] is equal to 8 are $b_{1} \approx 1.434$ and $b_{2} \approx 0.232$ .

Step-by-step explanation:

The mean value of function within a given interval is given by the following integral:

$\bar f = \frac{1}{b-a}\cdot \int\limits^b_a {f(x)} \, dx$

If $f(x) = 7 +10\cdot x - 9\cdot x^{2}$ , $a = 0$ , $b = b$ and $\bar f = 8$ , then:

$\frac{1}{b}\cdot \int\limits^b_0 {7+10\cdot x -9\cdot x^{2}} \, dx = 8$

$\frac{7}{b}\int\limits^b_0 \, dx + \frac{10}{b} \int\limits^b_0 {x}\, dx - \frac{9}{b} \int\limits^b_0 {x^{2}}\, dx = 8$

$\left(\frac{7}{b} \right)\cdot b + \left(\frac{10}{b} \right)\cdot \left(\frac{b^{2}}{2} \right)-\left(\frac{9}{b} \right)\cdot \left(\frac{b^{3}}{3} \right) = 8$

$7 + 5\cdot b - 3\cdot b^{2} = 8$

$3\cdot b^{2}-5\cdot b +1 = 0$

The roots of this polynomial are determined by the Quadratic Formula:

$b_{1} \approx 1.434$ and $b_{2} \approx 0.232$ .

The numbers $b$ such that the average value of $f(x) = 7 +10\cdot x - 9\cdot x^{2}$ on the interval [0, b] is equal to 8 are $b_{1} \approx 1.434$ and $b_{2} \approx 0.232$ .

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3 years ago

Two airplanes left the same airport and arrived at the same destination at the same time. The first airplane left at 8:00 a.m. a

liberstina [14]

First plane: 496x
<span>Second plane: 558( x - 1/2) </span>

<span>Equation: 496x = 558( x - 1/2) </span>

<span>Solving x = 9/2 , or x = 4.5 hours.

Hope this helps.</span>

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3 years ago

I may sound dumb... But what is the Prime Factorization of 68?? Please if I get this right I get 20 pts!!!

Illusion [34]

68
2 * 34
2 * 2 * 17 or 2^2 * 17 <===

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3 years ago

Read 2 more answers