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4 years ago

What is 18-2x(4+3) I need the answer

Mathematics

2 answers:

Cloud [144]4 years ago

7 0

I think the answer should've be 18

Rzqust [24]4 years ago

5 0

X= -12.5 you add (4+3) then, you combine it with 18 to get 25, then you divide 25 by -2x

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How do i do this find the missing side. round to the nearest tenth.

puteri [66]

Answer:

D) 29.8

Step-by-step explanation:

cos(62°) = 14/x

x = 14/cos(62°)

x = 29.8

6 0

3 years ago

Two triangles have the same base lengths. One Triangle has the height that is 4 times the height of the other triangle. Are the

Scrat [10]

YES

Area of Triangle 1

Base=b

Height= h

Area 1=A1=1/2*b*h

Area of Triangle 2

Base=b

Height= 4h

Area of triangle 2=A2=1/2*b*4h

Comparing A1 and A2

A2/A1= (1/2*b*4h)/(1/2*b*h)

= (1/2*b*4h)/(1/2*b*h)

=4/1

Ratio of heights =h2/h1= 4/1

Ratio of areas =A2/A1= 4/1

They are proportional.

4 0

3 years ago

Solve h^2− 42 = −h using the quadratic formula.

aleksandr82 [10.1K]

Hi there! The answer is C. h = 6 or h = −7

${h}^{2} - 42 = - h$
Add h to both sides of the equation.

$h {}^{2} + h - 42 = 0$
First we need to find the discriminant (which can be found using the formula D = b^2 - 4ac)

$d = 1 {}^{2} - 4 \times 1 \times - 42 \\ d = 1 + 168 \\ d = 169$

Now we can plug in our found values into the quadratic formula.

$x = \frac{ - b - \sqrt{d} }{2a} \: \\ or \\ \: x = \frac{ - b + \sqrt{d} }{2a}$

Plug in.
$x = \frac{ - 1 - \sqrt{196} }{2 \times 1} = \frac{ - 1 - 13}{2} = \frac{ - 14}{2} = - 7 \\ or \\ x = \frac{ - 1 + \sqrt{196} }{2 \times 1} = \frac{ - 1 + 13}{2} = \frac{ 12}{2} = 6$

Hence, the answer is C. h = 6 or h = −7

4 0

3 years ago

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The factored form of 4a3b5 − 16a5b2 + 12a2b3 is ?

Lady bird [3.3K]

4a^2b^2(ab^3-4a^3+3b)

7 0

3 years ago

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Neil is 4 years older than Andrea. If Neil was twice as old as Andrea four years ago, how old was Andrea?

tatuchka [14]

Answer: