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fiasKO [112]
2 years ago
8

This table shows the change in temperature x hours after sunset.

Mathematics
1 answer:
Drupady [299]2 years ago
3 0

Refer to the attachment

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Solve it:3/10×7/10=21/100
egoroff_w [7]
I'm gonna guess you're asking if the equation is true or false.
Well, the equation is True. 3/10 * 7/10 is 21/100, or in decimal form 0.21.
Converting 21/100 to a decimal is 0.21.
0.21 = 0.21.
21/100 = 21/100.
7 0
3 years ago
( 6x ^2 - x + 3 ) +( - 2x + x^2 - 7 )​
alexandr1967 [171]

Answer:

7x² - 3x - 4

Step-by-step explanation:

<u>Step 1: Write expression</u>

(6x² - x + 3) + (-2x + x² - 7)

<u>Step 2: Combine like terms (x²)</u>

7x² - x + 3 - 2x - 7

<u>Step 3: Combine like terms (x)</u>

7x² - 3x + 3 - 7

<u>Step 4: Combine like terms (constants)</u>

7x² - 3x - 4

8 0
3 years ago
Solve a triangle when A=15° B=113° and b=7?
JulsSmile [24]

Let us draw a triangle ABC with A=15° ,B=113° and b=7.

Please see the attached image.

We know that the sum of interior angles of a triangle is 180 degrees. Thus, we have

A+B+C=180\\&#10;\\&#10;15+113+C= 180\\&#10;\\&#10;C=62^{\circ}

Apply Sine rule in the triangle ABC, we get

\frac{a}{\sin 15}= \frac{7}{\sin 113}\\&#10;\\&#10;a=\frac{7 \sin 15}{\sin 113}\\&#10;\\&#10;a=1.97\\&#10;\\&#10;\text{Again apply sine rule, we get}\\&#10;\\&#10;\frac{c}{\sin 62}= \frac{7}{\sin 113}\\&#10;\\&#10;c=\frac{7 \sin 62}{\sin 113}\\&#10;\\&#10;c=6.71

Therefore, we have

a=1.97\\&#10;c=6.71\\&#10;C=62^{\circ}


4 0
3 years ago
Solve, using linear combination.<br><br> 3x – y = 4<br> 2x + y = 6
BlackZzzverrR [31]
X=2
y=2
hope this helps
ps. tiger algebra is a really good website!
5 0
3 years ago
I will give brainelest but i need help on the graph
const2013 [10]

Answer:

1)   (6,2) (9,2) (3,8) (3,5)

2)   (2,-5) (5,-5) (-1,-11) (-1,-8)

Step-by-step explanation:

For the first question, your reflecting over the x-axis into quadrant I, so you just need to make all the coordinates positive.  The numbers stay the same - you just get rid of the negative signs.  (6,2) (9,2) (3,8) (3,5)

For the second problem, you subtract 4 from the x-value, and 3 from the y-value.

(6,-2) becomes (2,-5)

(9,-2) becomes (5,-5)

(3,-8) becomes (-1,-11)

(3,-5)  becomes (-1,-8)

3 0
3 years ago
Read 2 more answers
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