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3 years ago

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A washer and dryer cost a total of $960. The cost of the washer is three times the cost of the dryer. Find the cost of each item

.
Cost of washer:

Cost of dryer:

1 answer:

xeze [42]3 years ago

8 0

Cost of washer: $720

Cost of dryer: $240

I've taken this test before and got it right, so you're good :)

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What is the product of<br> 9/20 - 1/4

wlad13 [49]

Answer:

$\frac{1}{5}$

Step-by-step explanation:

$\frac{9}{20} - \frac{1}{4}$

Make sure they have a common denominator. To do so, you must find a number the both have in come. Here, the number they have in common is 20.

What times 4 equals 20? 5. Whatever you do to the denominator you must do to the numerator.

$\frac{5}{5}$ × $\frac{1}{4}$ = $\frac{5}{20}$

Now you have $\frac{9}{20} - \frac{5}{20}$ = $\frac{4}{20}$

Then you can simplify $\frac{4}{20}$ to $\frac{1}{5}$ by dividing it by $\frac{4}{4}$

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3 years ago

A jar contains 20 green, 23 orange, 20 red, and 15 brown marbles. A marble is drawn at random. What is the probability that the

iogann1982 [59]

Answer: probability for the orange marble is 23/78 ; green= 20/78; red=20/78

Step-by-step explanation:there are 23 orangebmarbles out of all marbles which is 78 marbles and it doesn't help same for red and green marbles they both are 20 out of 78 marbles which is the total . So that is the probability of all the total marbles

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3 years ago

Read 2 more answers

What's the answer for the attachment

gulaghasi [49]

ABC is not a right angled triangle

<em><u>Solution:</u></em>

Given that, Triangle ABC has perimeter 18 cm

AB = 7 cm

BC = 3 cm

We have to find whether ABC is a right angled triangle

Let the sides of triangle be AB, BC, AC

<em><u>Perimeter of triangle is given by formula:</u></em>

perimeter = sum of length of all three sides of triangle

18 = AB + BC + AC

18 = 7 + 3 + AC

AC = 18 - 10

AC = 8

Thus the length of sides of triangle are:

AB = 7 cm

BC = 3 cm

AC = 8 cm

For a triangle to be right angle, it must satisfy the pythagoras theorem

Pythagorean theorem, states that the square of the length of the hypotenuse is equal to the sum of squares of the lengths of other two sides of the right-angled triangle.

The longest side of triangle is hypotenuse

Therefore, AC = 8 cm is the hypotenuse

Thus by above theorem we get,

$AC^2 = AB^2+BC^2$

Substituting the values we get,

$8^2 = 7^2 + 3^2\\\\64 = 49 + 9\\\\64 \neq 58$

Thus the pythagoras theorem is not satisfied

Thus ABC is not a right angled triangle

6 0

3 years ago

Kayla held a pole in the swimming pool. The bottom of the pole was at a depth of 3 feet. How should Kayla mark the level of the

RoseWind [281]

Answer:

Kayla should mark the level 3 whole tick marks to the left of the zero on the number line.

Step-by-step explanation:

This would mean the number is negative, for it is on the left of the zero. Another way to say this could be that the absolute value of -3 is three, for it is three whole tick marks from the zero.

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3 years ago

An article measured speeds of vehicles on several roads in the state of Kansas. On South Cedar Niles, 73 vehicles were observed,

kifflom [539]

Answer:

The sample supports the hypothesis that more than half of the vehicles in South Cedar Niles exceed the speed limit.

p-value = 0.00092

Step-by-step explanation:

To solve this problem, we run a hypothesis test about the population proportion.

Proportion in the null hypothesis $\pi_0 = 0.5$

Sample size (n) = 73

Sample proportion (p) = 49/73 = 0.6712

H0: $\pi_0 = 0.5$

Ha: $\pi_0 \geq 0.5$

Test statistic = $(p - pi)\sqrt{n} / \sqrt{\pi_0 (1-\pi_0)}$

Calculated statistic = $(0.6712 - 0.5)\sqrt{73} / \sqrt {0.5(1-0.5)} = 2.9255$

p-value = 0.00092

Since, p - value is less than or equal to 0.05, the null hypothesis must be rejected. The sample supports the hypothesis that more than half of the vehicles in South Cedar Niles exceed the speed limit.

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3 years ago