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2 years ago

If x= 4, calculate the value of: 3x2 + 4x

Mathematics

2 answers:

soldier1979 [14.2K]2 years ago

4 0

Answer:

Step-by-step explanation:

x = 4

Substitute x and calculate:

3x² + 4x =
3(4²) + 4(4) =
48 + 16 =
64

yaroslaw [1]2 years ago

3 0

Answer 64
Step by step exploration
3*4*4+4*4=48+16=64

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Plzzz i need an actual answer plz

natta225 [31]

Answer:

185.60944

Step-by-step explanation:

Using the formulas

A=πrl+πr2

l=r2+h2

Solving forA

A=πr(r+h2+r2)=π·4·(4+102+42)≈185.60944

5 0

2 years ago

A specifiic shade of green glaze requires 5 parts blue to 3 parts yellow. A glaze mixture contains 25 quarts of blue and 9 quart

horsena [70]

Remove 10 quarts from blue

5 parts blue 3 parts yellow
5 parts blue 3 parts yellow
5 parts blue 3 parts yellos

total: 15 parts blue
9 parts yellow

remove the remaining 10 parts blue, since you do not have any more yellow

6 0

2 years ago

Read 2 more answers

Okay I do not get questions like this ..

liberstina [14]

The answer is D cuz its a +ve parabola and symmetric to the x axis

8 0

3 years ago

Verify which of the following are identities.

-Dominant- [34]

Answer:

Only the second equation is an identity

Step-by-step explanation:

$8 \frac{\tan^2(\theta)}{\sec(\theta)} \csc^2(\theta)=8 \csc(\theta)$

Note that

$\tan^2(\theta)\csc^2(\theta)=\sec^2(\theta)$

You can confirm it:

$\frac{\sin^2(\theta)}{\cos^2(\theta)}\cdot \frac{1}{\sin^2(\theta)}= \frac{1}{cos^2(\theta)}= \sec^2(\theta)$

Therefore

$8 \frac{\sec^2(\theta)}{\sec(\theta)} =8 \csc(\theta)$

$8 \frac{\sec(\theta)}{1} =8 \csc(\theta)$

$8\sec(\theta)=8\csc(\theta)$

<h2>It is not an Identity</h2>

Let's the second one

$13 \frac{\tan^2(\theta)}{\sec(\theta)} \csc^2(\theta)=13\sec(\theta)$

In this case, we already performed the calculations, so it is true. It is an Identity.

3 0

2 years ago

It takes Billy 40 minutes to drive to his friends house at his normal speed but it takes two hours if he drives 20 mph slower ho

bulgar [2K]

Answer:

Step-by-step explanation:

d/t=mph

8 0

2 years ago