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3 years ago

What expression is equivalant to 8x+7x

Mathematics

2 answers:

VikaD [51]3 years ago

4 0

Answer:

What are the possible answers.

Step-by-step explanation:

Roman55 [17]3 years ago

3 0

Answer:

15x

Step-by-step explanation:

Simplify: 8x+7x = 15x

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Which property is illustrated by the equation ?

sdas [7]

What's the question?

3 0

3 years ago

Order the fractions from least to greatest: 1/2 1/3 1/4

SashulF [63]

Answer:

1/4, 1/3, 1/2 is your answer.

Step-by-step explanation:

1/4 in a decimal is .25.

1/3 in a decimal is .33 repeating.

1/2 in a decimal is .5.

1/4, 1/3, 1/2 is your answer.

4 0

3 years ago

The altitude of a triangle is increasing at a rate of 1.5 1.5 centimeters/minute while the area of the triangle is increasing at

seraphim [82]

Answer:

The base reduces at 3.75cm/min

Step-by-step explanation:

Given

Let

$h \to altitude$

$b \to base$

$A \to Area$

So:

$\frac{dh}{dt} = 1.5cm/min$

$\frac{dA}{dt} = 1.5^2cm/min$

The area of a triangle is:

$A = \frac{1}{2}bh$

Calculate b when $A =88cm^2; h =8cm$

$A = \frac{1}{2}bh$

$88=\frac{1}{2} * b * 8$

$88 =b * 4$

Solve for b

$b = 88/4$

$b = 22$

We have:

$A = \frac{1}{2}bh$

Differentiate with respect to time

$\frac{dA}{dt} =\frac{1}{2}(h\frac{db}{dt} + b\frac{dh}{dt})$

Substitute the following values in the above equation

$\frac{dh}{dt} = 1.5cm/min$ $\frac{dA}{dt} = 1.5^2cm/min$ $b = 22$ $h = 8$

$1.5 = \frac{1}{2}(8 * \frac{db}{dt} + 22 * 1.5)$

Multiply both sides by 2

$3 = 8 * \frac{db}{dt} + 22 * 1.5$

$3 = 8 * \frac{db}{dt} + 33$

Collect like terms

$8 * \frac{db}{dt} = 3 -33$

$8 * \frac{db}{dt} = -30$

Divide both sides by 8

$\frac{db}{dt} = -\frac{30}{8}$

$\frac{db}{dt} = -3.75$

4 0

3 years ago

If v = ibh find v when i =8,b = 6 and h = 4

rodikova [14]

Substitute in your numbers
v = 8*6*4
v = 192

3 0

3 years ago

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

dmitriy555 [2]

Answer:

Average speed of rabbit is 12.22 m/s

Step-by-step explanation:

Formula for average speed = $\frac{distance }{time}$

here distance = 22m

and time = 1.8s

therefore applying the average speed formula

$\frac{22}{1.8} =12.22 m/s$

So average speed for the Rabbit will be 12.22 m/s

4 0

3 years ago