2 years ago

7 divided by 1/2

n="absmiddle" class="latex-formula">

Mathematics

2 answers:

Elan Coil [88]2 years ago

7 0

The answer should be 14

Lina20 [59]2 years ago

6 0

Answer:

Step-by-step explanation:

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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.

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3 years ago

? cm 3 cm 7 cm 4 cm 7 cm Missing length

Ket [755]

Answer:

5 cm

7cm

Step-by-step explanation:

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3 years ago

8. If3:8=c:56, the value of c will be

adelina 88 [10]

The scale for the second values is 56/8 = 7

C = 3 x 7 = 21

C= 21

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3 years ago

Fully simplify ( 3 x + y 4 ) 2

Ainat [17]

Answer:

2/4-5

Step-by-step explanation:

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3 years ago

Read 2 more answers

Will pick brainlyest help me plz 15 pts

leonid [27]

1.50c + 2.50a = 1100
c + a = 500

multiply the second equation by -1.50

1.50c + 2.50a = 1100
-1.50c - 1.50a = -7.50

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4 years ago