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Sauron [17]
3 years ago
14

Which expression represents the phrase ''4 times as much as the sum of 15 and 9'' A. 4 x (15+9) B. (4 + 15) x 9 C. 4 + 15 x 9 D.

4 x 15 + 9
Mathematics
2 answers:
expeople1 [14]3 years ago
3 0
A. 4 × (15 + 9)
Is the correct answer.
Sedaia [141]3 years ago
3 0
The correct answer is a
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Three roots of the polynomial equation x4 - 4x3 - 2x2 + 12x + 9 = 0 are 3, -1 and -1. Explain why the fourth root must be a real
LiRa [457]
Descares Theorem says that the number of roots of a polynomial is equal to its highest exponent, and the roots could be real and/or imaginary (complex).

However is their is one complex root (a + i.b), it's conjugate is also
a root (a-i.b).

In the equation x⁴ - 4x³ - 2x² + 12x + 9 = 0, we have already 3 roots, then the 4rth cannot be a complex one since we don't have a fifth for its conjugate.

3 0
3 years ago
Cora makes a scarf with cloth rectangles and triangles. For every 5 pieces of cloth, 2 are rectangles. She needs 15 pieces of cl
PtichkaEL [24]

Answer: There are 6 pieces of cloth are rectangles and 9 pieces of cloth are triangles.

Explanation:

Since we have given that

For every 5 pieces of cloth, 2 are rectangles

So, remaining piece will be of triangle so,

5-2=3

3 are triangles.

Ratio of rectangles to triangles is 2:3.

Now, she needs 15 pieces of cloth to complete her scarf,

So, Number of rectangles is needed is given by

\frac{2}{5}\times 15\\\\=2\times 3\\\\=6

Number of triangles is needed is given by

\frac{3}{5}\times 15\\\\=3\times 3\\\\=9

Hence, there are 6 pieces of cloth are rectangles and 9 pieces of cloth are triangles.

6 0
3 years ago
How many inches is that
Nonamiya [84]

Answer:

I wouldnt know.

Step-by-step explanation:

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5 0
3 years ago
 Can you solve 2^x=e^(x+2)
mina [271]
<u>Answer:</u> Yes, I can.


Although you haven't asked for the solution, here it is anyway:

2^x = e^(x+2)

x ln(2) = x+2

x ln(2) - x = 2

x [ ln(2) - 1 ] = 2

x = 2 / [ ln(2) - 1 ]

x = 2 / -0.3069... =<u> - 6.518</u>... (rounded) 

8 0
4 years ago
Read 2 more answers
What is the value of the expression
Nookie1986 [14]

Answer:

D 3.5

Step-by-step explanation:

Replace values in the equation with values given. Calculate.

5 0
3 years ago
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