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3 years ago

consider the expression -2 + 5a + B + 2a - 5b which term can be combined with 5a because they are like terms

Mathematics

2 answers:

scoray [572]3 years ago

7 0

Answer:

2a could be combined with 5a

Step-by-step explanation:

they both have an (a) after them

oksian1 [2.3K]3 years ago

6 0

Answer: if this is the answer your look for 7a-4b-2

Step-by-step explanation:

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This table shows the scores that Jack had on his last five science tests.

arlik [135]

Answer:

the answer is B the mean can't be greater than the median

8 0

2 years ago

What is the simplest radical form of the expression? (8x4y5)23

Komok [63]

The radical form of the expression $(8x^{4} y^{5} )^{2/ 3}$ is $4(\sqrt[3]{x^{4}y^{5} } )^{2}$

<h3>How to express an expression in radical form?</h3>

$(8x^{4} y^{5} )^{2/ 3}$

using indices law,

(yⁿ)ˣ = yⁿˣ

Therefore,

2³ = 8

Hence,

$(2^{3} x^{4} y^{5} )^{2/ 3}$ = $4(x^{4} y^{5} )^{2/ 3}$

Finally, in radical form,

$4(x^{4} y^{5} )^{2/ 3} = 4(\sqrt[3]{x^{4}y^{5} } )^{2}$

learn more on radical form here: brainly.com/question/27875405

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6 0

2 years ago

In a certain college, 33% of the math majors belong to ethnic minorities. If 7 students are selected at random from the math maj

Digiron [165]

Answer: a) 0.996, b) 0.253, c) 0.02.

Step-by-step explanation:

Since we have given that

Probability of success = Probability of the math majors belong to ethnic minorities = 33% = 0.33 =p

Probability of failure = q = 1-0.33 = 0.67

Number of students selected = 7

a) No more than 5 belong to an ethnic minority

So, using "binomial distribution", we get that

$P(X\leq 5)=\sum^5 _{x=0} ^5C_x(0.33)^x(0.67)^{5-x}=0.996$

b. Exactly three of them belong to an ethnic minority

So, it becomes,

$P(X=3)=^7C_3(0.33)^3(0.67)^4=0.253$

c. None of them belong to an ethnic minority

$P(X=0)=^7C_0(0.33)^0(0.67)^7=0.02$

Hence, a) 0.996, b) 0.253, c) 0.02.

8 0

3 years ago

A 15ft. wire is tied to the top of a tree to provide support. If the wire forms a 25° angle with the ground, what is the height

lana [24]

Answer: $6.34\ ft$

Step-by-step explanation:

Given

The length of the wire is $l=15\ ft$

The Wire makes an angle of $25^{\circ}$ with horizontal

Suppose the height of the tree is h

From the figure, we can write

$\Rightarrow \sin 25^{\circ}=\dfrac{h}{l}\\\\\Rightarrow h=l\sin 25^{\circ}\\\Rightarrow h=15\sin 25^{\circ}\\\Rightarrow h=6.34\ ft$

Thus, the height of the tree is $6.34\ ft$

4 0

3 years ago

Steve buys 2 lb of grapefruit and 3 lb of oranges for $7.20. Kennedy buys 4 lb of grapefruit and 2 lb of oranges for $8.80. Let

MrMuchimi

Answer: $\left \{ {{2x+3y=7.20} \atop {4x+2y=8.80}} \right.$

Step-by-step explanation:

Let be "x" the price per pound for grapefruit, "y" the price per pound for oranges.

We know that Steve buys 2 pounds of grapefruit and 3 of oranges for $7.20.

This means that the sum of the products of $2x$ and $3y$ is $7.20. Then, we can write this equation to represent it:

$2x+3y=7.20$

Kennedy buys 4 pounds of grapefruit and 2 pounds of oranges for $8.80.

This means that the sum of the products of $4x$ and $2y$ is $8.80. Then, we can write this equation to represent this:

$4x+2y=8.80$

Therefore, we get that the system of equations that models the situation is:

$\left \{ {{2x+3y=7.20} \atop {4x+2y=8.80}} \right.$

8 0

3 years ago

consider the expression -2 + 5a + B + 2a - 5b which term can be combined with 5a because they are like terms​

consider the expression -2 + 5a + B + 2a - 5b which term can be combined with 5a because they are like terms