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3 years ago

15

Solve for y: 2x+3y=21

1 answer:

stealth61 [152]3 years ago

6 0

Answer:

y = 7 - 2x/3

Step-by-step explanation:

Make the y alone, so 3y = -2x+21

Divide everything else by 3, so y = -2x/3 +7

You end with the answer of y= 7-2x+3

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If cheese is $4.40 per kilogram, what should i pay for 200 grams

Contact [7]

1 kg is 1,000 grams.

200 grams are 1/5 of 1000 grams, that is 1/5 of 1 kg.

Thus 200 g= 1/5 kg = 0.2 kg.

1 kg of cheese is <span>$4.40,
</span>
so 0.2 kg of cheese is $\displaystyle{ \frac{0.2kg \cdot \$4.40}{1kg}}=4.40 \cdot0.2 \$= 0.88\$$

Answer: $0.88

8 0

3 years ago

Read 2 more answers

Please help me in with these two questions Geometry.

horrorfan [7]

Answer:

#1 is A #2 is A

Step-by-step explanation:

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3 years ago

Is this triangle congruent? If so, list the congruent parts and justify your answer. Then state the criteria.

jeyben [28]

Answer:

Step-by-step explanation:

IN TRIANGLE ADB AND CDB

1 . < ADB = < DBC ( BEING ALTERNATE ANGLE )

2 . DB = DB ( COMMON SIDE )

3. <ABD = <BDC ( BEING ALTERNATE ANGLE )

4. △CDB ≅ΔADB ( BY ASA AXIOM )

PROVED ..

5 0

3 years ago

Consider the following piece-wise function. Which of the below correctly describes the graph shown?

elena55 [62]

Answer:

C.

$f(x)=\left\{\begin{array}{l}\dfrac{1}{2}x-3,\ \ x$

Step-by-step explanation:

The graph of the piecewise function consists of two linear functions which graphs meets at point with x-coordinate x = 2.

1. The left linear function is determined for all x < 2 and is passing through the points (0,-3) and (-2,-4). So, its slope is

$\dfrac{-4-(-3)}{-2-0}=\dfrac{-1}{-2}=\dfrac{1}{2}$

and its equation is

$y-(-3)=\dfrac{1}{2}(x-0)\\ \\y=\dfrac{1}{2}x-3$

2. The right linear function is determined for all x ≥ 2 and is passing through the points (2,-2) and (3,1). So, its slope is

$\dfrac{1-(-2)}{3-2}=\dfrac{3}{1}=3$

and its equation is

$y-1=3(x-3)\\ \\y=3x-8$

3. Hence, the expression for the piece-wise function is

$f(x)=\left\{\begin{array}{l}\dfrac{1}{2}x-3,\ \ x$

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3 years ago

Decide which of the following sets of points.

Luden [163]

Answer:

Im pretty sure that the answer would be choice f.

Step-by-step explanation:

7 0

3 years ago