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2 years ago

PLZZZZ ANSWER ASAP!!!

Mathematics

2 answers:

joja [24]2 years ago

7 0

Answer:

$area = 2 \times ( \frac{1}{2} \times 1.5 \times 7) + (8 \times 7) \\ = 10.5 + 56 \\ = 66.5 \: sq \: units$

$\small{ \star{ \underline{ \blue{becker}}}}$

Rasek [7]2 years ago

3 0

Answer:

45.5 u²

Step-by-step explanation:

first we need to find the base of the triangle so we subtract 8-5=3, now since its 2 triangles we divide by 2 and we get 1.5 for each base of the triangles

area for a triangle: A=bh/2

A=(1.5)(7)/2

since its 2 triangles then multiply by 2

A= 10.5 u²

area for a rectangle: A=bh

A=(7)(5)

A= 35 u²

35+10.5 = 45.5 u²

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A cylindrical container has a radius of 0.3 meter and a height of 0.75 meter. The container is filled with kerosene. The density

saveliy_v [14]

Answer:

172.83 kg

Step-by-step explanation:

A cylindrical container has a radius (r) of 0.3 meter and a height (h) of 0.75 meter and density of 815 kg/m³.

The density of a substance is the mass per unit volume, it is the ratio of the mass of a substance to the volume occupied. The density is given by the formula:

Density = Mass / volume

The volume of a cylinder is given as:

V = πr²h

V = π × (0.3)² × 0.75 = 0.212 m³

Density = Mass/ volume

Mass = Density × Volume

Mass = 815 kg/m³ × 0.212 m³

Mass = 172.83 kg

6 0

2 years ago

I need help please.

makkiz [27]

Answer:

see explanation

Step-by-step explanation:

Using the rules of radicals/ exponents

$a^{m}$ × $a^{n}$ = $a^{(m+n)}$

$a^{\frac{m}{n} }$ ⇔ $\sqrt[n]{a^{m} }$

Simplifying each term

7 $\sqrt{x^{3} }$ = 7 $x^{\frac{3}{2} }$

x $\sqrt{9x}$

= x × $\sqrt{9}$ × $\sqrt{x}$

= x × 3 × $x^{\frac{1}{2} }$

= 3 × $x^{(1+\frac{1}{2}) }$

= 3 $x^{\frac{3}{2} }$

Subtracting the 2 simplified like terms, that is

7 $x^{\frac{3}{2} }$ - 3 $x^{\frac{3}{2} }$

= 4 $x^{\frac{3}{2} }$ ← return to radical form

= 4 $\sqrt{x^{3} }$

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ivolga24 [154]

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Kruka [31]

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