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Arlecino [84]
3 years ago
13

Factorise x^2 + 7x -30

Mathematics
2 answers:
kumpel [21]3 years ago
7 0
The answer is 
(x+10)(x-3)
maks197457 [2]3 years ago
3 0
x^{2} + 7x - 30 \\ \\ (x - 3)(x + 10) \\ \\ Answer: \fbox {(x - 3)(x + 10)}
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If 5=q what is the value of 4q + 2q squared
pentagon [3]

The value of 4q+2q is 30
5 0
3 years ago
Ten young adults living in California rated the taste of a newly developed sushi pizza topped with tuna, rice, and kelp on a sca
timurjin [86]

Answer: For California: μ = 33.1; σ² = 1120.50; Range = 32;

For Iowa: μ = 24.5; σ² = 32.73; Range = 19

Step-by-step explanation:

Mean is the average of a population or a sample. It is defined as

μ = ∑x / n, where

x is each number of the set;

n is the total individuals in the sample.

Calculating the <u>Mean</u> for sample of taste of pizza in <u>California</u>:

μ₁ = \frac{34+39+40+46+33+31+34+14+15+45}{10} = 33.1

Calculating the <u>Mean</u> for the sample in Iowa:

μ₂ = \frac{28+25+35+16+25+29+24+26+17+20}{10} = 24.5

Variance measures how far the number in the set is from the mean. Its formula is

σ² = (∑x-μ)² / n -1

which means to find the variance, you have to get the difference between the number and the mean, square the result, add all of them and then divide by (n-1) individuals.

The <u>Variance</u> for the sample in <u>California</u> is

σ² = \frac{(34 - 33.1)^{2}+(39-33.1)^{2}+(40-33.1)^{2}+(46-33.1)^{2}+(33-33.1)^{2}+(34-33.1)^{2}+(14-33.1)^{2}+(15-33.1)^{2}+(45-33.1)^{2}}{9}σ² = 120.50

The <u>Variance</u> for the sample in <u>Iowa</u> is

σ² = 32.73

Range is the difference between the highest and the lowest number of the set: range = highest - lowest

For the sample in <u>California</u>, the <u>Range</u> is

range = 46 - 14 = 32

For the sample in Iowa:

range = 35 - 16 = 19

For California:

  • Mean = 33.1;
  • Variance = 120.50;
  • Range = 32;

For Iowa:

  • Mean = 24.5;
  • Variance = 32.73;
  • Range = 19;

<u />

6 0
3 years ago
9 /5 = 6 5 /x how to solve step by step
ziro4ka [17]
<h2>Answer: x=\frac{325}{9}</h2>

Step-by-step explanation:

  1. Cross-multiply.
  2. Divide both sides by 9.

4 0
2 years ago
For each problem below put the lettered measures in order for greatest to the least
Len [333]

Angles can be used to estimate the side lengths of a shape.

The letters in order of greatest to least are (a), (b) and (c)

The sum of angles at side (a) is:

a = 30 + 50

a = 80

The sum of angles at side (c) is:

c = 50 + 90

c = 140

The sum of angles at side (b) is:

b = 40 + 90

b = 130

So, we have:

a = 80

b = 130

c = 140

The smaller the base angles, the longer the side.

Hence, the letters in order of greatest to least are (a), (b) and (c)

Read more about angles at:

brainly.com/question/11585894

4 0
2 years ago
Write an equation of the line that passes through (2,−5) and is parallel to the line 2y=3x+10.
r-ruslan [8.4K]

Step-by-step explanation:

the eqn is 3x-2y+10=0

slope m=-3/-2=3/2 (m=(-xcoeff/ycoeff)

eqn is

y-y1=m(x-x1)

y+5=3/2(x-2)

2y+10=3x-6

3x-2y-16=0

8 0
3 years ago
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