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Lady bird [3.3K]

2 years ago

14

= Solving a word problem with two unknowns using a linear... A washer and a dryer cost $650 combined. The washer costs $100 less

than the dryer. What is the cost of the dryer?

1 answer:

nikdorinn [45]2 years ago

7 0

Answer:

Washer 225

Dryer 425

.....

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If h = 21 units and r = 7 units, what is the volume of the cone shown above?

salantis [7]

your answer should be D because you have to multiply 3.14 times 21 times 7 to get 461.58

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2 years ago

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Make each metric conversion:

sergiy2304 [10]

Answer:

300 cm * 1 m / 1,000 cm = .3 m

45 m * 1 deka / 10 m = 4.5 dekameters

900 mm * 1 cm / 10 mm = 90 cm

Step-by-step explanation:

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2 years ago

Simplify the following expression. 95 + 5[14 - (3 + 8)] A. 140 B. 190 C. 220 D. 110

kherson [118]

Answer:

The answer is D. 110

Step-by-step explanation:

You add 8 and 3 and get 11 first because in parentheses, and then you subtract that by 14, which will give you 3. Then you multiply 3 times 5 to get 15 and add that to 95 to get your answer. Hope this helps!

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2 years ago

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This parabola has<br> x-intercepts

slega [8]

Answer:

see the explanation

Step-by-step explanation:

we have the quadratic equation

$y=-16x^{2} +32x-10$

This is a vertical parabola open downward

The vertex is a maximum

Find the x-intercepts of the quadratic equation

The x-intercepts are the values of x when the value of y is equal to zero

so

For y=0

$-16x^{2} +32x-10=0$

Solve the quadratic equation

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16x^{2} +32x-10=0$

so

$a=-16\\b=32\\c=-10$

substitute in the formula

$x=\frac{-32(+/-)\sqrt{32^{2}-4(-16)(-10)}} {2(-16)}$

$x=\frac{-32(+/-)\sqrt{384}} {-32}$

$x=\frac{-32(+/-)8\sqrt{6}}{-32}$

$x=\frac{-32(+)8\sqrt{6}}{-32}=\frac{32(-)8\sqrt{6}}{32}=0.39\ sec$

$x=\frac{-32(-)8\sqrt{6}}{-32}=\frac{32(+)8\sqrt{6}}{32}=1.61\ sec$

therefore

This parabola has two x-intercepts representing the times when the dolphin's height above water is zero feet

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2 years ago

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How do you find the area of a triangle

motikmotik

A=1/2b(h) this is the formula to find the area of a triangle

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2 years ago

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