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3 years ago

10

Which statement could be proved false using a counterexample?

1 answer:

vagabundo [1.1K]3 years ago

4 0

All acute angles are 30 degrees.

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Find the Sum (3x+x^7 +5x^2) +( 4x^2 -2x +8).

dexar [7]

Answer:

x^7 + 9x^2 + x + 8

Step-by-step explanation:

Combine like terms

5 0

3 years ago

What is the length of the hypotenuse of the triangle?

masha68 [24]

10 star-root 2 end units

8 0

3 years ago

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Becky bought a magazine for $3.90, and the sales tax was 8.25%. How much sales tax did Becky pay on the magazine?

igor_vitrenko [27]

Answer:

32 cents

Step-by-step explanation:

Find 8.25 percent of 3.90:

0.0825*3.90 = 0.32

3 0

3 years ago

Read 2 more answers

100 POINTS HELP ASAP Linear Combination

notka56 [123]

Answer:

1) $x=\dfrac12$

2) $n = -3 \ \ \textsf{and} \ \ m = -4$

3) see below

4) A: 0 = 1

Step-by-step explanation:

<u>Question 1</u>

$15-0.5(4x-2)+4x=17$

$\implies 15-2x+1+4x=17$

$\implies 2x+16=17$

$\implies 2x=1$

$\implies x=\dfrac12$

<u>Question 2</u>

$\textsf{rearrange} \ n=m+1 :$

$\implies -m=-n+1$

$\textsf{add equations} \ -m=-n+1 \ \textsf{and} \ m=2n+2:\\$

$\implies0=n+3$

$\implies n=-3$

$\textsf{substitute} \ \ n=-3 \ \ \textsf{into} \ \ m=n-1:$

$\implies m=-3-1$

$\implies m=-4$

<u>Question 3</u>

subtract the second equation from the first

divide both sides by -4

substitute found value for y into first equation

solve for x

<u>Question 4</u>

$3j=k$

$k=3j+1$

$\textsf{rearrange} \ 3j=k :$

$\implies -k=-3j$

$\textsf{add equations}\ -k=-3j \ \ \textsf{and}\ \ k=3j+1:$

$\implies 0=1$

Solution = A

6 0

2 years ago

A box have 5 beads of the same size, but all are different colors. Tina draws a bead randomly from the box, notes its color, the

Mila [183]

Since Tina replaces the beads after each pick:

P(R,G,R)=(1/5)(1/5)(1/5)=1/125

7 0

3 years ago