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STatiana [176]
3 years ago
11

Can you guys plzzz help. This is precalc. I’m a senior

Mathematics
2 answers:
Dafna1 [17]3 years ago
8 0

Answer:

See below.

Step-by-step explanation:

Eddi Din [679]3 years ago
3 0

Answer:

1. \left[\begin{array}{ccc}-3&-8\\6&3\\2&8\end{array}\right]  , 2.  \left[\begin{array}{ccc}-8&-4&21\\-8&6&7\end{array}\right]

Step-by-step explanation

1. \left[\begin{array}{ccc}4&-3\\0&-1\\5&8\end{array}\right] - \left[\begin{array}{ccc}7&5\\-6&-4\\3&0\end{array}\right]

To solve just that each in the first matrix block and substract     with their equivalent in the second matrix block.  

For example 4 -7 = -3, -3-5= -8

\left[\begin{array}{ccc}-3&-8\\6&3\\2&8\end{array}\right]  

2. -2\left[\begin{array}{ccc}10&2&-3\\1&6&-5\end{array}\right]  + 3\left[\begin{array}{ccc}4&0&5\\-2&6&-1\end{array}\right]

Multiply first block with -2 and the second block by 3

\left[\begin{array}{ccc}-20&-4&6\\-2&-12&10\end{array}\right] + \left[\begin{array}{ccc}12&0&15\\-6&18&-3\end{array}\right]

Add just the same as question 1

\left[\begin{array}{ccc}-8&-4&21\\-8&6&7\end{array}\right]

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6 0
3 years ago
Write an equation in slope-intercept form for the line with y-intercept −5 and slope −2/5
riadik2000 [5.3K]

Answer:

\large\boxed{y=-\dfrac{2}{5}x-5}

Step-by-step explanation:

The slope-intercept form of an equation of a line:

y=mx+b

<em>m</em><em> - slope</em>

<em>b</em><em> - y-intercept</em>

<em />

We have

m=-\dfrac{2}{5},\ b=-5

Substitute:

y=-\dfrac{2}{5}x+(-5)}=-\dfrac{2}{5}x-5

8 0
3 years ago
I need help with question one &amp; two
Zolol [24]
The atomic number above the element is the number of protons inside of it.
That’s number 1 so answer is 169.
Number 2 is H because in the description above it states it is highly reactive
6 0
3 years ago
Find angle x and y. Please show step by step process.
lora16 [44]

Answer:

x = 60, y = 25

Step-by-step explanation:

Δ ABC has 3 congruent sides and is equiangular, thus

the 3 angles are congruent, all 60°

x = 60

∠ ABC and ∠ CBD are adjacent and supplementary, sum to 180° , then

∠ CBD = 180° - 60° = 120°, so

y = 180 - (120 + 35) = 180 - 155 ← sum of angles in triangle

y = 25

4 0
3 years ago
30. Felipe va a hacer un banderín para su equipo de fútbol, con las medidas que se indican en la figura. ¿Cuánta tela ocupará pa
blagie [28]

Veremos que el area del banderín es 930cm^2, entonces la opción correcta es A.

<h3>¿Que area tiene el banderin?</h3>

Luego de una pequeña busqueda online, pude ver que el banderin es un triangulo isósceles con base de 31cm y altura de 60 cm.

Recordar que para un triangulo de base b y altura h, el area es:

A = b*h/2

Entonces el area del banderín va a ser:

A = (31cm)*(60cm)/2 = 930cm^2

Entonces la opción correcta es A.

Sí quieres aprender más sobre triangulos, puedes leer:

brainly.com/question/2217700

8 0
2 years ago
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