The table shows the ratio between the number of packets and the number of seeds of a certain plant contained in them:

Mathematics

1 answer:

vichka [17]2 years ago

8 0

Answer:

the thired grap.

Step-by-step explanation:

it is for the test i toke

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What is the solution of the equation x2 + 8x + 5 = 0?

Setler79 [48]

Answer:

x = -0.683 (3dp)

x = -7.317 (3dp)

Step-by-step explanation:

Step 1: Apply the quadratic formula

(-b±( $\sqrt{b^{2}-4ac}$ )) / 2a

a = 1 (x²)

b = 8 (8x)

c = 5 (5)

(-8±( $\sqrt{8^{2}-4 x 1 x 5}$ )) / 2 x 1

Step 2: Simplify

(-8±( $\sqrt{44}$ )) / 2

Step 3: Solve

You need to replace the ± with first a + and then a -.

(-8+( $\sqrt{44}$ )) / 2 = -0.683 (3dp) = x

(-8-( $\sqrt{44}$ )) / 2 = -7.317 (3dp) = x

Hope this helps!

5 0

2 years ago

Can you prove that DEF = HGF.!? Justify your answer.

frosja888 [35]

Step-by-step explanation:

$In \: \triangle DEF \: \& \: \triangle HGF \\ EF \: \cong \: GF...(given) \\ \angle EFD \cong \angle GFH \\ (vertically \: opposite \: angles) \\ \ DF \: \cong \: HF...(given) \\ \therefore \: \triangle DEF \cong \triangle HGF \\ (By\: SAS \:criterion\: of \:congruence)$