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3 years ago

An elephant’s weight starts at 25 kilograms

Mathematics

2 answers:

Semenov [28]3 years ago

6 0

Answer:

it means teh elephant grows 3 kilograms per month instead

Step-by-step explanation:

Anastaziya [24]3 years ago

6 0

Answer:

Instead of growing 5 Kilograms the elephant will now only grow 3 kilograms each month

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b) How many white-winged cross bills will there be at the end of June 2020? (Remember that t represent

Mandarinka [93]

Answer:

A dozen = 12

Step-by-step explanation:

I think I’m right

4 0

3 years ago

Find the discriminant and determine the nature of the roots to the quadratic equation

Katen [24]

№17
$x^{2} +6x-7=0 \\ D=6 ^{2} -4*(-7)=36+28=64=8 ^{2} \\ \\ x_{1} = \frac{-6+8}{2} =1 \\ \\ x_{2} = \frac{-6-8}{2} =-7$
Answer: x₁ = 1
   x₂ = - 7

№18
$2 x^{2} -3x+4=3 \\ 2 x^{2} -3x+4-3=0 \\ 2 x^{2} -3x+1=0 \\ \\ D= -3 ^{2} -4*2=9-8=1 \\ \\ x_{1} = \frac{3+1}{2*2} = \frac{4}{4} =1 \\ \\ x_{2} = \frac{3-1}{2*2} = \frac{2}{4} =0.5$
Answer: x₁ = 1
     x₂ = 0,5.

№19
$2 x^{2} -4x-5=0 \\ D=-4 ^{2} -4*2*(-5)=16+40=56 \\ \\ x_{1}= \frac{4+ \sqrt{56} }{2*2} = \frac{4}{4} + \sqrt{ \frac{56}{16} } =1+ \sqrt{3.5} \\ \\ x_{2} = \frac{4- \sqrt{56} }{2*2} = \frac{4}{4} - \sqrt{ \frac{56}{16} } =1- \sqrt{3.5} 
$
Answer: x₁ = 1 + √3.5
     x₂ = 1 - √3.5

3 0

3 years ago

Help please :( 4^5 x 4^ -7 divide by 4^ -2 ?

alexandr1967 [171]

Answer:

4⁻⁴

Step-by-step explanation:

4⁵ × 4⁻⁷ ÷ 4⁻²

⁺ ⁵ ⁻ ⁷

= ⁻²

⁻ ² ⁻ ²

= ⁻ ⁴

4⁻⁴

7 0

3 years ago

Solve by factoring x^2-8x-20-0

Oksana_A [137]

X^2-8x-20 and if you rewrite that it’s (x-10) (x+2)

5 0

2 years ago

Read 2 more answers

How to solve - (12/h) -7f h=3 f=7

pogonyaev

Answer:

-53

Step-by-step explanation:

-(12/3)-7(7)

-4-49=-53

4 0

2 years ago