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Sphinxa [80]
3 years ago
5

A function is defined by f(x)=6x+1.5. What is f(2.5)

Mathematics
2 answers:
Nataly_w [17]3 years ago
8 0

f(2.5) means x is equal to 2.5.

Replace x in the equation with 2.5 and solve:

6(2.5) + 1.5 = 15 + 1.5 = 16.5

f(2.5) = 16.5

andre [41]3 years ago
7 0

Answer:

16.5

Step-by-step explanation:

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2 years ago
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42 is 30% of what number??? Add work plz
romanna [79]
X - the number

30\% x =42 \\
\frac{30}{100}x=42 \\
\frac{3}{10}x=42 \\
x=42 \times \frac{10}{3} \\
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42 is 30% of 140.
7 0
3 years ago
6.
Katarina [22]

Answer:

Step-by-step explanation:

Comparing the triangles in the given questions, the following can be deduced:

5. The scale factor = \frac{15}{10} = \frac{12}{8} ≠ \frac{9}{7}

So that;

QR is similar to UT, PR is similar to US, but PQ is NOT similar to TS.

Thus, the triangles are NOT similar.

6. Scale factor = \frac{15}{10} = \frac{12}{8} = \frac{9}{6}

                         = 1.5

So that;

QR is similar to UT, PR is similar to US, but PQ is similar to TS.

Thus, the triangles are similar by Side-Side-Side (SSS).

7. Here, an exact scale factor can not be determined. Thus, the triangles are NOT similar.

7 0
2 years ago
4. A river tour boat is going down a stream to a park for lunch and then back up. It is a 60-mile round trip. On
DiKsa [7]

Answer:

The speed of the boat in still water is 10 miles / hour

Step-by-step explanation:

The trip there, and the trip back are the same -- 30 miles

Let the rate of the boat = x

Let the rate of the water = y

30 = 2*(x + y)

30 = 6*(x - y)

Divide the top equation by 2

Divide the bottom equation by 6

15 = x + y

<u>5  = x - y   </u>            Add the equations together.

20 = 2x                 Divide by 2

20/2 = x

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3 0
2 years ago
The prism shown has a volume of 35 cm.
Fiesta28 [93]

Answer:

the height is 2.5 cm

Step-by-step explanation:

The computation of the height of the triangular section is shown below:

As we know that

Volume = One-half × base × height

35 = One-half × 4 × height × 7

So, the height is 2.5 cm

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2 years ago
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