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ololo11 [35]
3 years ago
5

Factor completely. - 3x² + 14x- 8

Mathematics
1 answer:
brilliants [131]3 years ago
7 0

Answer =

= - 3x² + 14x - 8

= - 3x² + 12x + 2x - 8

= - 3x(x - 4) + 2(x - 4)

= (x - 4)(-3x + 2)

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20 POINTS / WILL GIVE BRAINLIEST
padilas [110]

Answer: Total Volume =  15π + 18 π= 33π cubic mm

Step-by-step explanation:

What is the volume of the composite figure? Leave the answer in terms of π.

_33π mm3

We have a cone here conjoined to a semi-sphere.

so

Cone volume:  C = (1/3)*(πr^2) * h

semi-sphere volume :  V = (1/2)* (4/3) * (π * r^3)

r = 3 mm  and  h = 5mm

so   C = (1/3)*(π  (3)^2) * 5 =  15π  cubic mm

V = (1/2)* (4/3) * (π * 3^3) = 18 π cubic mm

Total Volume =  15π + 18 π= 33π cubic mm

3 0
3 years ago
Pinto is planning to paint the walls of a bedroom that is 20 feet long, 15 feet wide, and 8 feet high. Is he too has 1 gallon of
eimsori [14]

Answer:

0.4 gallons

Step-by-step explanation:

Length of a bedroom= 20 feet

Breadth of a bedroom= 15 feet

Height of a bedroom= 8 feet

Area of walls of a bedroom= 2(l+b)×h

Area of walls of a bedroom=2(20+15)×8 ft^{2}

Area of walls of a bedroom= 2× 35×8  ft^{2}

Area of walls of a bedroom=560  ft^{2}

Amount of paint in 1 gallon = 400 ft^{2}

Number of gallons required= \frac{560}{400}

Number of gallons required= 1.4 gallons

Hence, 0.4 extra gallons required

5 0
3 years ago
2. What is the value of x if the angles<br> within a triangle are 2x +1, 7x-2 and 3x<br> +5?
noname [10]

Answer:

 x=14.67\\°

Step-by-step explanation:

The sum of all the three angles of any triangle is 180°

Putting sum of all the angles given equals to 180°

                      (2x+1)+(7x-2)+(3x+5)=180°

                              2x+7x+3x+1-2+5=180°

                                                         12x+4=180°

                                                                   x=\frac{180-4}{12}

                                                                   x=14.67\\°

The value of the x is found on solving the given angles of the triangles.

8 0
3 years ago
Heath weighed 198 pounds. he lost 5% of his weight.Later he gained back 7% of his current weight.Hiw much does heath weigh now?
Rus_ich [418]
198 x 0.05 = 9.9
198 - 9.9 = 188.1
188.1 x 0.07 = 13.167
188.1 + 13.167 = 201.267

He weighs 201.3 pounds if you round it.
8 0
3 years ago
Please help Im timed!
Natalka [10]
15:10
3:2
Hope this helps :)

4 0
3 years ago
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