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Debora [2.8K]
3 years ago
12

Factorise each of the following a2+9a+8

Mathematics
2 answers:
Tanzania [10]3 years ago
8 0

Answer:

Step-by-step explanation:

I suppose the expression is this a^2+9a+8.

We can factor out this expression ( Remember, find two numbers that the sum is 9 and the product is 8. The numbers are 8 and 1)

a^2+9a+8=(a+1)(a+8)

Stella [2.4K]3 years ago
5 0

Answer:

well.. according to my calculation this was the factors that are Angles there are 50 Angles and 32 factors so the answer is ×÷=357_/ 97_/^23*32/##_ 23/ 1/2 3÷214

so that was the answer!

Step-by-step explanation:

Hope you understand this explanation!!and it may help!!

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What is the area of this figure? <br><br> ___ units^2
enot [183]

Answer:

42\ units^{2}

Step-by-step explanation:

we know that

The area of the figure is equal to the area of a rectangle plus the area of two triangles

<u>Find the area of rectangle</u>

Observing the graph

The area of rectangle is equal to

A=bh=(2+5)(2+2)=28\ units^{2}

<u>Find the area of the top triangle</u>

A=\frac{1}{2}bh=\frac{1}{2}(2+5)(4-2)=7\ units^{2}

<u>Find the area of the bottom triangle</u>

A=\frac{1}{2}bh=\frac{1}{2}(2+5)(-2+4)=7\ units^{2}

the area of the figure is equal to

A=28\ units^{2}+7\ units^{2}+7\ units^{2}=42\ units^{2}

5 0
3 years ago
You spin the spinner below one time.
guapka [62]

Answer:

there are 12 equals spaces 4 are greater than 12.

4/12 = 1/3

8 0
3 years ago
Read 2 more answers
Suppose that 1% of all computers of a certain type experience CPU failure during the warranty period. If a simple random sample
Zigmanuir [339]

Answer:

A)

μ = 5

σ = 2.2

B)

P(0) = 0.0066

C)

P(x ≥ 4) = 0.74

Step-by-step explanation:

A) The expected value is going to be the same as the mean μ.

We can use the binomial probability distribution because there are a fixed number of trials (500), each trial is independent and there are only two possible outcomes (CPU failure or not) and the probability of failure has the fixed value 0.01.

For binomial distributions:

μ = np, where p is the probability (in this case of CPU failure) and n is the number of trials (500)

μ = (500)(0.01) = 5

σ = \sqrt{npq}, where q = 1 - p

σ = \sqrt{(500)(0.01)(0.99)} = 2.2

B) We can use the binomial probability formula

P(x)=(\frac{n!}{(n-x)!x!}) × pˣ × qⁿ⁻ˣ

P(0)=(\frac{500!}{(500-0)!0!}) × 0.01⁰ × 0.99⁵⁰⁰

C) In this case wee need to use a binomial distribution calculator. Setting n as 500, π = 0.01 and finding the probability above 3.

6 0
3 years ago
What pair of factors of −42 has a sum of 1? PLEASE HELP
anastassius [24]

Answer:

-6 and 7

Step-by-step explanation:

-6 and 7 multiply to be -42.

When you add the two values: -6+7=1

Their sum is 1!

Hope this helps

4 0
4 years ago
Read 2 more answers
the vertex of this parabola is at (-2,-3).When the y value is -2 the x value is -5 what is the coefficient of the squared term i
WITCHER [35]
Y=a (x-h) ^ + k
so your parabola has an equation of:
y=a(x+2)^ -3

-2=a(5+2) ^ -3
-2=a(-3)^-3
-2=9a-3


adding them to both sides
1=9a

divide both sides:
1=9a

Divide both sides by 9:
a=1/9

the vertex form is:
y=(1/9)(x+2)^-3

The expanded form is:
y=(1/9)x^ + (4/9)x - (23/9)

Anw: E. (1/9)




3 0
4 years ago
Read 2 more answers
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