3 years ago

Determine the domain of this graph

Mathematics

1 answer:

goblinko [34]3 years ago

4 0

(0,4) should be the answer

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If y varies directly ás x, and y = 7 when x = 3. find y when x=7

vlada-n [284]

Answer:

y = $\frac{49}{3}$

Step-by-step explanation:

Given y varies directly as x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition

x = 3 when y = 7

k = $\frac{y}{x}$ = $\frac{7}{3}$ , thus

y = $\frac{7}{3}$ x ← equation of variation

When x = 7, then

y = $\frac{7}{3}$ × 7 = $\frac{49}{3}$

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4 years ago

Please help me!! Test due in an hour

vovangra [49]

Answer:

you might want to do more reseearch but to me it looks like c

6 0

3 years ago

Which ordered pair is the solution to the system of equations?

prisoha [69]

Answer:

$(3, -3)$

Step-by-step explanation:

{у = 3х - 12

{4х + 6у = −6

4x + 6[3x - 12] = −6

4x + 18x - 72 = −6

−6 = −72 + 22x

+72 + 72

___________

66 = 22x

__ ___

22 22

$3 = x$ [Plug this back into both equations above to get the y-coordinate of −3]; $-3 = y$

I am joyous to assist you anytime.

3 0

3 years ago

Please show the solving

alisha [4.7K]

Step-by-step explanation:

YELLOW TRIANGLE:

$\sin(30) = \frac{x}{12} \\ x = 12 \sin(30) = 6$

PURPLE TRIANGLE:

Since one of the angle is 45°, x = BC = 6

To prove:

$\tan(45) = \frac{bc}{x} \\ bc = x \tan(45) = 6 \tan(45) = 6$

PINK TRIANGLE:

$\tan(60) = \frac{bc}{y} \\ y = \frac{bc}{ \tan(60) } \\ = \frac{6}{ \tan(60) } \\ = 2 \sqrt{3}$

8 0

3 years ago

The manger of a large store notices that there are 72 customers waiting to be check out, spread across 9 different check-out lin

Alika [10]

72 divided by 9 = 8

Hope I helped

5 0

4 years ago