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3 years ago

Please help me solve this, I will give you Brainliest. !

Mathematics

2 answers:

Brrunno [24]3 years ago

6 0

$\frac{8 + x}{2}$

emmainna [20.7K]3 years ago

4 0

Answer:

$\boxed{\frac{8+x}{2} }$

Step-by-step explanation:

→ Work out the sum of 8 and x

8 + x

→ Divide that by 2 since it says 1/2 of the sum

$\frac{8+x}{2}$

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The altitude of a triangle is increasing at a rate of 1 cm/min while the area of the triangle is increasing at a rate of 2 cm2/m

Mnenie [13.5K]

Answer:

The base is reducing at a rate of 3.4cm per min.

Step-by-step explanation:

Let The Height of the Triangle, h

Area of the triangle = A

Area of a Triangle, $A= \frac{1}{2}bh$

When $A=190 cm^2, h=10cm$

$190= \frac{1}{2}*b*10\\b=38cm$

$\frac{dA}{dt}=\frac{1}{2}h\frac{db}{dt}+ \frac{1}{2}b\frac{dh}{dt}\\\frac{dh}{dt}=1 cm/min, \frac{dA}{dt}=2cm^2/min,$

$2=\frac{1}{2}*10*\frac{db}{dt}+ \frac{1}{2}*38*1\\2=5\frac{db}{dt}+19\\2-19=5\frac{db}{dt}\\-17=5\frac{db}{dt}\\\frac{db}{dt}=-\frac{17}{5} =-3.4 cm/min$

The base is reducing at a rate of 3.4cm per min.

8 0

3 years ago

53, Margie usually drinks 12.25 liters of water in one week (7 days), 1 she continues to drink water at the same rate, what is t

Anna [14]

Using the information given in the question, the total number of liters Margie will drink in a 4 week period is 39

Consider the given information:

12.25 liters per week
Continues this for 4 weeks

Equation formed with said information:

Liters per week × The 4-week period

Solving the equation

12.25 × 4

= 49

Therefore, after the 4-week period Margie would of drank 49 liters

4 0

2 years ago

Help please it due at 8

umka2103 [35]

I need help my self lol XD sorryyyyyyyyy88898

8 0

2 years ago

Type your answer and then click or tap Done. Simplify -(x-2y) - y.

AlladinOne [14]

Answer:

Step-by-step explanation:

x(x-2y)-(y-x)2

Final result :

-y2

Step by step solution :

Step 1 :

Equation at the end of step 1 :

x • (x - 2y) - (y - x)2

Step 2 :

2.1 Evaluate : (y-x)2 = y2-2xy+x2

Final result :

-y2

4 0

2 years ago

Read 2 more answers

I need help and fast

suter [353]

Why are you taking a map test in january

4 0

2 years ago