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3 years ago

7

Write an equivalent expression. 7.) 27x- 5y + 5x

1 answer:

abruzzese [7]3 years ago

5 0

Answer:

<em>32x - 5y </em>

Step-by-step explanation:

27x - 5y + 5x = <em>32x - 5y</em>

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I need help with this question 2x+8

grandymaker [24]

Answer:

2(x+4)

Step-by-step explanation:

4 0

3 years ago

For what value of a does (1/9)^a+1 =81^a+1 x 27^2-a ?<br><br>-4<br>-2<br>2<br>6

EastWind [94]

Answer:

- 4

Step-by-step explanation:

Using the rule of exponents

• $a^{m}$ × $a^{n}$ ⇔ $a^{(m+n)}$

• $a^{-m}$ ⇔ $\frac{1}{a^{m} }$

$(\frac{1}{9}) ^{a+1}$ = $9^{-(a+1)}$ = $3^{-2(a+1)}$

and right side

= $3^{4(a+1)}$ × $3^{3(2-a)}$

Hence

$3^{-2a-2}$ = $3^{4a+4}$ × $3^{6-3a}$

$3^{-2a-2}$ = $3^{a+10}$

Equating exponents on both sides gives

a + 10 = - 2a - 2 ( add 2a to both sides )

3a + 10 = - 2 (subtract 10 from both sides )

3a = - 12 ( divide both sides by 3 )

a = - 4

4 0

4 years ago

Read 2 more answers

What is the lowest prime number 1,2,3,4

olga nikolaevna [1]

Hey there, well we know a prime number must have exactly two factors, which is 1 and its self. 2 is the lowest prime number because because the common divisors for 2 is 1 and 2. Therefore, 2 is the lowest prime number.

6 0

4 years ago

Read 2 more answers

Two points, A and B, are on opposite sides of a building. A surveyor chooses a third point, C, 60 yd from B and 105 yd from A, w

Virty [35]

In the given question it is given that , AC = 105 yd, BC = 60 yd and angle ACB= 69.3 degree.

We have to find the distance of AB, and for that we use law of cosine, which is

$(AB)^2 = (AC)^2 +(BC)^2-2(AC)(BC) cos \theta$

Substituting the values of AC, BC and theta, we will get

$(AB)^2 = 105^2 +60^2 -2(105)(60) cos 69.3$

$(AB)^2 = 10171.217$

$AB= 101 yard$

6 0

3 years ago

Two sailboats had a race. Sailboat A traveled 40 feet every 5 seconds, and sailboat B traveled 56 feet every 8 seconds. Which sa

Novosadov [1.4K]

Answer:

Sailboat A won the race, and it was going 8 feet per second.

Step-by-step explanation:

Sailboat A was traveling at 40 feet per every 5 seconds, so, to find how many feet it was going per second, we would do 40 feet/5 seconds, which is 8 feet.

Sailboat B was traveling at 56 feet per every 8 seconds, so we use the same method. 56 feet/8 seconds is 7 feet.

So, Sailboat A won because it was going faster! :)

6 0

2 years ago