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3 years ago

Alex can type 72 words per minute.How many words can Alex type in 5 minutes?

Mathematics

2 answers:

Vaselesa [24]3 years ago

8 0

Divide 72 into 5 and you get 144 words in 5 minutes.

atroni [7]3 years ago

5 0

$72\ words\ in\ one\ minute\\\\
x\ words\ in\ 5\ minutes\\\\Making\ proportion:\\
72-1\\x-5\\\\cross\ multiplication\\\\
72*5=x\\\\
x=360\\\\
In\ 5\ minutes\ Alex\ can\ type\ 360\ words.$

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III Probability of an event A box is filled with 2 blue cards, 3 red cards, and 7 yellow cards. A card is chosen at random from

Arada [10]

Answer:

3/4

Step-by-step explanation:

You add all the cards in the boxes = 3+2+7 = 12

Probability of picking up a yellow or blue card = 2+7 =9

Hence:

9/12

simplify: 3/4

5 0

3 years ago

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morpeh [17]

Answer:

7.7 km

Explanation:

Use cosine rule as here given two sides and one angle.

Cosine rule states:

a² = b² + c² - 2bc cos(A)

While solving, treat a = 7.5 km as to that opposite angle is given of 68°

then b = missing side, c = 5.2 km, A = 68°

Applying rule:

7.5² = b² + 5.2² - 2(b)(5.2) cos(68)

56.25 = b² + 27.04 - 3.8959b

56.25 - 27.04 = b² - 3.8959b

b² - 3.8959b = 29.21

b² - 3.8959b - 29.21 = 0

apply quadratic equation, Here [a = 1, b = - 3.8959, c = -29.21]

$\sf b = \dfrac{ -b \pm \sqrt{b^2 - 4ac}}{2a} \quad\:when \:\ ax^2 + bx + c = 0$

$\sf b = \dfrac{ -(-3.8959) \pm \sqrt{(-3.8959)^2 - 4(1)(-29.21)}}{2(1)}$

$\sf b = 7.69 291 \quad or \quad b = -3.797$

$\sf b = 7.7 \quad (rounded \ to \ nearest \ tenth)$

As length cannot be negative. Hence the value of b is only 7.7 km

7 0

2 years ago

Read 2 more answers

A fair spinner has 11 equal sections: 4 red, 4 blue and 3 green.

Darina [25.2K]

Answer:

24/121

Step-by-step explanation:

The probability of an event happening is the ratio of the number of possible outcome to the number of total outcome.

The probability of not getting green then green

= rg or bg

Where r is the probability of getting red, g is the probability of green and b is the probability of blue.

= 4/11 * 3/11 + 4/11 * 3/11

= 12/121 + 12/121

= 24/121

4 0

3 years ago

Match the set of two interior angle measurements with the third interior angle measurement that can make a triangle.

ioda

Answer:

$40^\circ,50^\circ$ and 90^\circ$

$42^\circ,66^\circ$ and 72^\circ$

$60^\circ,60^\circ$ and 60^\circ$

Step-by-step explanation:

The sum of angles in a triangle is 180 degrees

(a)Given the angles 40° and 50°

The third angle is, therefore: $180^\circ-(40^\circ+50^\circ)=90^\circ$

We, therefore, have the set: $40^\circ,50^\circ$ and 90^\circ$

(b)Given the angles 42° and 66°

The third angle is, therefore: $180^\circ-(42^\circ+66^\circ)=72^\circ$

We, therefore, have the set: $42^\circ,66^\circ$ and 72^\circ$

(c)Given the angles 60° and 60°

The third angle is, therefore: $180^\circ-(60^\circ+60^\circ)=60^\circ$

We, therefore, have the set: $60^\circ,60^\circ$ and 60^\circ$

6 0

3 years ago

Please help me

kotegsom [21]

The answer is A. Hope it helps

5 0

3 years ago

Read 2 more answers