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Alina [70]
3 years ago
6

Find the sum of -3x^2-x-10 and 10x^2+x-10

Mathematics
2 answers:
Jobisdone [24]3 years ago
6 0

Answer:

7x^2-20

Step-by-step explanation:

Dvinal [7]3 years ago
5 0

Answer:

1.<em> -2</em>

<em>2.-10</em>

Step-by-step explanation:

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Classify the variable z in <br>z square = 0.02<br>as rational or irrational ​
DochEvi [55]

Answer:

Irrational

Step-by-step explanation:

When we take the square root of both sides, we get z = 0.141421... and since there are no fractions and the decimals go endlessly on, it is irrational.

3 0
4 years ago
The safety inspector in a large city wants to estimate the proportion of buildings in the city that are in violation of fire cod
Drupady [299]

Answer:

Proportion of buildings in the city that have fire code violations: 10%

Uncertainty 0.3 = 30%

Step-by-step explanation:

This situation complies with a binomial model where p is the probability of finding a building having fire code violations and q=1-p

Since in random sample of 40 buildings chosen for inspection 4 of them are found to have fire code violations, the proportion  is 4/40 = 0.1 or 10% and  p=0.1 as well.

<em>In a</em> <em>binomial model the standard deviation s is: </em>

<em>\large s=\sqrt{npq} </em>

<em>where n is the sample size</em>. So

\large s=\sqrt{40*0.1*0.9}=1.8974

and the uncertainty is the standard error SE

\large SE=\frac{s}{\sqrt{n}}=\frac{1.8974}{\sqrt{40}}=0.3=30\%

7 0
4 years ago
A = 5 + 3 ( 4 - 2 )
saul85 [17]
A=11 is the answer Hope this helped
8 0
3 years ago
Read 2 more answers
Find Sn for the given series if: a1=22 d=-8 n=21 <br><br> F)1911 G)-1449 H)-2436 I)-1218
GuDViN [60]

3∑x=2 72x5∑x=3 −2x−23∑x=3 −1x2

3 0
3 years ago
El contratista encargado de construir el
andrezito [222]

El perímetro del lote tiene una medida de 130 · p - 12 unidades.

<h3>¿Cuál es la longitud del cerco perimetral para un lote?</h3>

El perímetro es la suma de las longitudes de los lados de una figura, un rectángulo tiene cuatro lados, dos pares de lados iguales. En consecuencia, el perímetro del lote es el siguiente:

s = 2 · w + 2 · l

Donde:

  • w - Ancho del lote.
  • l - Largo del lote.
  • s - Perímetro del lote.

Si sabemos que w = 25 · p - 8 y l = 40 · p + 2, entonces el perímetro del lote es:

s = 2 · (25 · p - 8) + 2 · (40 · p + 2)

s = 50 · p - 16 + 80 · p + 4

s = 130 · p - 12

El perímetro tiene una medida de 130 · p - 12 unidades.

<h3>Observación</h3>

No se ha podido encontrar una figura o imagen asociada al enunciado del problema. Sin embargo, se puede inferir que el lote tiene una forma rectangular debido a las medidas utilizadas. En consecuencia, asumimos que la medida del ancho es igual a 25 · p - 8 unidades y del largo es igual a 40 · p + 2 unidades.

Para aprender más sobre perímetros: brainly.com/question/17127243

#SPJ1

7 0
1 year ago
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