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2 years ago

PLEASE HELP ASAP!!! :)))))

Mathematics

1 answer:

kifflom [539]2 years ago

3 0

Answer: I think it is 9

Step-by-step explanation: The parabola has a maximum because it is open down. The maximum is on the y axis.

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In circle O, AD and BE are diameters.

earnstyle [38]

Answer:

I get it now.

Step-by-step explanation:

6 0

3 years ago

A ladder 10 feet long rests against a vertical wall. Initially, the top of the ladder is 8 feet above the ground. If the top of

lora16 [44]

Step-by-step explanation:

Let vertical height of ladder from ground be y and

horizontal distance of the base of the ladder from the wall be x respectively.

Length of the ladder = l (constant) = 10 ft

Using Pythagoras theorem:

${l}^{2} = {y}^{2} + {x}^{2}$

Differentiate both sides w.r.t time

$0 = 2y \frac{dy}{dt} + 2x \frac{dx}{dt}$

$y \frac{dy}{dt} + x \frac{dx}{dt} = 0$

We know that (After 1 sec, y = 6 ft and x = 8 ft ; dy/dt = 2 ft/sec)

$6\times 2 + 8\frac{dx}{dt} = 0$

$\frac{dx}{dt} = - 1.5 ft \: per \: sec$

( Ignore - ive sign)

Therefore, bottom of the ladder is sliding away from the wall at a speed of 1.5 ft/sec one second after the ladder starts sliding.

8 0

3 years ago

1/5 (5x-15) -2x What is the question ?? How do I solve the problem ??

Ksenya-84 [330]

Answer:

$-x-3$

Step-by-step explanation:

They want you to simplify the expression.

Step 1: Apply the distributive property.

$\frac{1}{5} (5x)+\frac{1}{5} (-15-2x)$

Step 2: Cancel the common factor of 5.

$x+\frac{1}{5} (-15-2x)$

Step 3: Cancel the common factor of 5.

$x-3-2x$

Step 4: Subtract 2x from x.

$-x-3$

8 0

3 years ago

3. Frank is considering two cell phone plans. The first company charges $120 for the

zheka24 [161]

Answer:

5.333 months

Step-by-step explanation:

Company A: 120+30x

Company B: 40+ 45x

120+30x=40+45x

80=15x

80/15=x

5.33333=x

7 0

2 years ago

2. Meryl spends a total of $68.82 for 2 pairs of 68.8

kupik [55]

Answer:

The cost of each pair of sneakers is $33.25.

Step-by-step explanation:

Consider the provided information.

Meryl spends a total $68.82 for 2 pairs of sneakers with the same cost.

If the sales tax is $5.32 and she also uses a coupon for $3.00 off her purchase.

First subtract the sales tax from the spend amount.

$\$68.82- \$5.32=\$63.5$

She use a coupon for $3.00 OFF.

$\$63.5+\$3=\$66.5$

$66.5 was the cost of 2 pairs of sneakers before using the coupon.

Now divide $66.5 by 2 so that we can find the cost of one pair of sneakers.

$\frac{\$66.5}{2} =\$33.25$

Hence, the cost of each pair of sneakers is $33.25.

5 0

3 years ago