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3 years ago

Does anyone know the actual answer to this and could help me that would be nice

Mathematics

1 answer:

Morgarella [4.7K]3 years ago

3 0

Answer:

see explanation

Step-by-step explanation:

Given

- $\frac{1}{2}$ [ - $\frac{3}{2}$ c + 6c + 1 ] - 3c

Distribute the square bracket by - $\frac{1}{2}$

= $\frac{3}{4\\}$ c - 3c - $\frac{1}{2}$ - 3c

Collect like terms

= $\frac{3}{4}$ c - 6c - $\frac{1}{2}$

= $\frac{3}{4}$ c - $\frac{24}{4}$ c - $\frac{1}{2}$

= - $\frac{21}{4}$ c - $\frac{1}{2}$

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What is the hypotenuse of an triangle with sides 6 and 8 and angles 30 and 60 degrees?

klemol [59]

Hypotenuse ^2 = base^2 + perpendicular ^2

H^2 = 6^2 + 8^2
H^2 = 36 + 64
H^2 = 100
H = 10

(This is a right angle triangle as 60+30= 90
180-90= 90)

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4 years ago

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4 years ago

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. In April, it rained 1/4 of an inch on 15 different days. How many inches of rain fell

notka56 [123]

Answer:

3.75, or $\frac{15}{4}$ inches of rain during the 15 days of April.

Step-by-step explanation:

All you have to do is add $\frac{1}{4}$ 15 times to get that number.

$\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ + $\frac{1}{4}$ = 3.75

You can also do 15 times $\frac{1}{4}$ , which will result in the same thing.

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3 years ago

here are approximately 4.2 million births in a country each year. Find the birth rate in units of births per minute.

marusya05 [52]

Answer:

8 births to 1sf

Step-by-step explanation:

4.2m births per year in unspecified country.

4.2 / 0.000365 = 11506.8493 per day

11506.8493 / 24 = 479.452054 per hour

479.452054 / 60 = 7.99086757 per minute = 8 births to 1sf

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3 years ago

Select the correct answer from each drop-down menu.

romanna [79]

Answer:

Area of ΔXYZ = n(r * r) square units

Step-by-step explanation:

Sides of ΔABC are 30 units, 40 units and 60 units.

Corresponding sides of another triangle XYZ are r times as long as the sides of ΔABC.

Therefore, sides of ΔXYZ will be, 30r units, 40r units and 60r units.

Perimeter of the triangle XYZ = 30r + 40r + 60r

= 130r units

If the area of ΔABC = n square units

Then the ratio of the area of ΔXYZ and ΔABC = (Ratio of the sides of ΔXYZ and ΔABC)²

$\frac{\text{Area of triangle XYZ}}{\text{Area of triangle ABC}}=(\frac{\text{Side length of XYZ}}{\text{Side length of triangle ABC}})^2$

$\frac{\text{Area of triangle XYZ}}{n}=(r)^2$

Area of ΔXYZ = nr² ≈ n(r * r)

Therefore, Option (3) will be the answer.

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3 years ago