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2 years ago

If f(x) = 3x^2 + 10, what is f( – 7)?=

Mathematics

1 answer:

iogann1982 [59]2 years ago

8 0

Answer:

f(-7) = 157

Step-by-step explanation:

3x² + 10

3(-7)² + 10

3(49) + 10

147 + 10

157

<em>good luck, i hope this helps :)</em>

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What is 17728272×93738383?

Olegator [25]

Answer:

1.6618196e+15

Step-by-step explanation:

I promise this is right. Can u pls give me brainliest

5 0

3 years ago

The radius of a circle is 2.9 in. Find the circumference to the nearest tenth.

ELEN [110]

Answer:

$\bf \large 20 \: inches$

Step-by-step explanation:

<h2>Given that :</h2>

The radius of a circle is 2.9 in.

Find the circumference to the nearest tenth.

<h2>formulas used :</h2>

circumference = 2 × π × r

where,

π = 22/7
r = 2•9 inches

<h2>explanation :</h2>

⟼ c = 2πr

⟼ c = 2 × 22/7 × 2•9 inches

⟼ c = 2 × 3•14 × 2•9 inches

⟼ c = 6•28 × 2•9 inches

⟼ c = 18•21 inches.

<h2>Round to the nearest tenth :</h2>

⟼ c = 18•21 inches

⟼ c = 20 inches

∴ circle circumference is 20 inches .

3 0

3 years ago

In a laboratory, they were testing a certain bacteria. They stated with 50 bacteria and they noticed it triples every 30 minutes

MaRussiya [10]

I think it’s just 4(50•3)=600

4 0

2 years ago

6. Solve each system of equations. 7x – 12y = 180 7x = 84 b. | -16y = 4x 4x + 27y= 11

soldi70 [24.7K]

Answer:

1: y= -15x

2: in the ss

Step-by-step explanation:

4 0

3 years ago

15 POINTS ANSWER ASAP, SHOW WORK

forsale [732]

Answer:

$V=97.6\ in^3$

Step-by-step explanation:

step 1

Find the volume of the cylinder

The volume of the cylinder is equal to

$V=\pi r^{2}h$

we have

$r=4/2=2\ in$ ---> the radius is half the diameter

$h=8\ in$

substitute

$V=\pi (2)^{2}(8)\\\\V=32\pi\ in^3$

step 2

Find the volume of the cone

The volume of the cone is equal to

$V=\frac{1}{3}\pi r^{2} h$

we have

$r=2\ in$ ---> the radius is the same that the radius of the cylinder

$h=0.70\ in$

substitute

$V=\frac{1}{3}\pi (2)^{2} (0.70)\\\\V=0.93\pi\ in^3$

step 3

Find the volume of the plastic object

we know that

The volume of the plastic object is equal to the volume of the cylinder minus the volume of the cone

$V=32\pi-0.93\pi=31.07\pi\ in^3$

assume

$\pi=3.1416$

$V=31.07(3.1416)=97.6\ in^3$

8 0

3 years ago