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2 years ago

Do the number 7 please I really need it do tomorrow

Mathematics

1 answer:

irakobra [83]2 years ago

6 0

Answer: y=4, x=-2

Step-by-step explanation:

line r must have the equation y=4 to go through point (-2,4)

line s must have the equation x=-2 to go through point (-2,4)

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An object at the top of a building with height 110 feet is thrown upward with an initial speed of 23 ft/s. Find its position z(t

alina1380 [7]

Answer:

Step-by-step explanation:

Given

Height of building is $h=110\ ft$

Initial upward velocity $u=23\ ft/s$

height of object is given by

$z(t)=ut+\frac{1}{2}gt^2$

but building is already at a height of 110 ft so z(t) must be given by

$Z(t)=ut+\frac{1}{2}(-g)t^2+110$

$Z(t)=23\times t-\frac{1}{2}\times 9.8\times t^2$

$Z(t)=-16t^2+23t+110$

Time when it hits is given by when Z(t)=0[/tex]

$-16t^2+23t+110=0$

$t=\frac{-23\pm \sqrt{(23)^2-4\times (-16)\times 110}}{2\times (-16)}$

$t=\frac{-23\pm 87}{-32}$

$t=3.43\ s$

6 0

3 years ago

The sum of the digits of a 2-digit number is 1. What is the number?

Gnom [1K]

Answer:

The number is 10

3 0

2 years ago

Read 2 more answers

Select the correct answer from the drop-down menu. A whole number is 6 more than 2 times another number. The sum of the two numb

olya-2409 [2.1K]

Answer:

$x = \{13,14\}$

Step-by-step explanation:

Given

$x + 2x + 6 < 50$

Required

True values of x

We have:

$x + 2x + 6 < 50\\$

$3x + 6 < 50$

Collect like terms

$3x < 50-6$

$3x < 44$

Divide both sides by 3

$x < 44/3$

$x < 14.67$

This means that x has a value lesser than 14.67.

Hence, the valid values are:

$x = \{13,14\}$

7 0

2 years ago

<img src="https://tex.z-dn.net/?f=3v%2B1%3D22" id="TexFormula1" title="3v+1=22" alt="3v+1=22" align="absmiddle" class="latex-for

Verizon [17]

<h2>Answer:</h2>

<h2>Step-by-step explanation:</h2>

$3v + 1 = 22 \\ \\ 3v = 22 - 1 \\ \\ 3v = 21 \\ \\ v = \frac{21}{3} \\ \\ v = 7$

7 0

3 years ago

Read 2 more answers

Using Euler’s Formula (F + V = E + 2), find the number of vertices.

Usimov [2.4K]

I don't know euler's formula but I can guess that the one you gave is enough

F=18
V=?
E=33
so

18+?=33+2
18+?=35
minus 18 from both siddes
?=17

vertices is 17

7 0

3 years ago

Read 2 more answers