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motikmotik
4 years ago
10

Evaluate the following algebraic expression: 2 x + y for x = 1 and y = 1​

Mathematics
1 answer:
12345 [234]4 years ago
8 0

Answer:

3

Step-by-step explanation:

2*1+1

2+1

3

how this helps :)

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Find the value of p in 5p/2 =25/4
Nadusha1986 [10]

Answer:

I think you would have to add 12.5 to the 5

Step-by-step explanation:

6 0
3 years ago
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3 cos 2x + Sinx = 1 for<br>0° ≤x ≤ 360​
Archy [21]

Answer:

x = 41.81°, 138.19°, 210°, 330°

Explanation:

3cos(2x) + sin(x) = 1

subtract one from both sides

→ 3cos(2x) + sin(x) − 1 = 0

rewrite using trigonometry identities

→ 2 + sin(x) − 6sin²(x) = 0

solve x by substitution

f(x) = 2 + sin(x) − 6sin²(x)

= 2 + 4sin(x) - 3sin(x) − 6sin²(x)

= −2sinx(3sinx −2) − (3sinx−2)

= (3sinx −2)(−2sinx−1)

= −(3sinx −2)(2sinx+1)

f(x) = 2 + sin(x) − 6sin²(x) = 0

= −(3sinx −2)(2sinx+1) = 0

(3sinx −2) = 0 (2sinx+1) = 0

→sinx = 2/3 →sinx = −1/2

x = 41.81°, 138.19° x = 210°, 330°

(Please heart the answer if you find it helpful, it's a motivation for me to help more people)

3 0
3 years ago
This week, customers at a carpet store pay $3 for a square foot of carpet. Next week the store will be having a sale. During the
fomenos

The area of Neil's rooms total

... (10 ft)×(10 ft) + (14 ft)×(14 ft) = 100 ft² +196 ft²

... = 296 ft²

Since Neil will save $1 per square foot by waiting on the sale, he will save

... (296 ft²)×($1/ft²) = $296

7 0
3 years ago
Devon set out to bicycle from Exeter to the beach, a distance for 10 miles. After going a short while at 15 miles per hour, the
enyata [817]

Answer:

Distance between Exeter and the point where flat tire occurred was 1.875 miles.

Step-by-step explanation:

Let the distance of Exeter and the point where bike developed the flat tire was = x miles

Then time taken to reach that point with speed 15 mi per hour = \frac{\text{Distance traveled}}{\text{Time taken}}

= \frac{x}{15} hours

Devon comes back with a speed of 3 miles per hour then time taken to come back = \frac{x}{3} hours

Total time for the entire episode = 48 minutes or \frac{3}{4} hours

Therefore, \frac{x}{15}+\frac{x}{3}=\frac{3}{4}

\frac{x+5x}{15}=\frac{3}{4}

\frac{6x}{15}=\frac{3}{4}

x = \frac{3}{4}\times \frac{15}{6}

x = \frac{15}{8} miles

x = 1.875 miles

Therefore, distance between Exeter and the point where flat tire occurred was 1.875 miles.

6 0
3 years ago
What does 1.20 mean in this situation?
Klio2033 [76]

Answer:

hshsjzhzzoazuhsox9 hzbskznzjzbziznzkalajhzisjshaoianajs9zjgz

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