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svet-max [94.6K]
4 years ago
7

Factor 7x^2-22x+3. I really need help with this. please

Mathematics
2 answers:
sergij07 [2.7K]4 years ago
4 0

Answer:

(7x-1)*(x-3)

7x^2−22x+3

break expression in groups:

(7x^2-x)+(-21x+3)

factor out "x" from (7x^2-x)

x(7x-1)

factor out -3 from (-21x+3)

-3(7x-1)

x(7x-1)-3(7x-1)

factor out the common terms <em>7x-1</em>

(7x-1)(x-3)

Answer:

(7x−1)(x−3)

Hope this helps!

Dmitry [639]4 years ago
4 0
......................................
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Which equation represents a population of 250 animals that decreases at an annual rate of 21%
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Answer:

y= 250( 1-0.21)^x

Step-by-step explanation:

This represents exponential decay

6 0
4 years ago
Please answer the following questions: <br><br> 1. 1/2*8=<br> 2. 1/4*4=<br> 3. 1/3*6=
yan [13]
Hey there!

When we multiply fractions and whole numbers, we simply take that whole number and put it over them, and just multiply across. That gives us:

\frac{1}{2}x*8 = \frac{8}{2} = 4

Notice how it's four, because when we have a fraction, we divide. 8 divided by 2 equals four. Next:

\frac{1}{4} *4 = \frac{4}{4} = 1

4/4 is equal to 1 because 4 divided by 4 is one. 4 goes into 4 once. Next, we have:

\frac{1}{3}*6 = \frac{6}{3} = 2

That's because 6/3 = 2.

Hope this helps!

7 0
3 years ago
Read 2 more answers
Multiplies to -1120 adds to 3
TEA [102]
With these, always write out the multiples first.

Start like this:
(assume one of the factors is negative)
1 and 1120
2 and 560
4 and 280
5 and 224
7 and 160
8 and 140
10 and 112
14 and 80
16 and 70
20 and 56
28 and 40
32 and 35

from those, the obvious choice is the one with a difference of three. In this case, 32 and 35, because -32 + 35 equals 3.
6 0
3 years ago
Find the numerical value if x=4 and y=5. 3x^2+6y=
Veseljchak [2.6K]

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228

Step-by-step explanation:

7 0
4 years ago
In ΔRST, t = 4.1 inches, r = 7.1 inches and ∠S=45°. Find the length of s, to the nearest 10th of an inch.
dem82 [27]

Answer:

The length of s is 5.1 inches to the nearest tenth of an inch

Step-by-step explanation:

In Δ RST

∵ t is the opposite side to ∠T

∵ r is the opposite side to ∠R

∵ s is the opposite side to ∠S

→ To find s let us use the cosine rule

∴ s² = t² + r² - 2 × t × r × cos∠S

∵ t = 4.1 inches, r = 7.1 inches, and m∠S = 45°

→ Substitute them in the rule above

∴ s² = (4.1)² + (7.1)² - 2 × 4.1 × 7.1 × cos(45°)

∴ s² = 16.81 + 50.41 - 41.1677568

∴ s² = 26.0522432

→ Take √ for both sides

∴ s = 5.10413981

→ Round it to the nearest tenth

∴ s = 5.1 inches

∴ The length of s is 5.1 inches to the nearest tenth of an inch

3 0
3 years ago
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