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guajiro [1.7K]
3 years ago
5

Help me plz!!!!! I have no ideia how to do this

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
4 0

Answer:

<h2>x² = -3</h2>

Step-by-step explanation:

In algebra, the goal is always to isolate the variable, so its value can be determined.

<h3>Step 1: Subtract 21</h3>

7x² = -21

<h3>Step 2: Divide by 7</h3>

x² = -3

<h3>Step 3: Check</h3>

7(-3) + 21 = 0

0 = 0 ✔

<h3>Step 4: Answer</h3>

x² = -3

I'm always happy to help :)

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Lia has a dog and a cat. Together, the pets weigh 24 pounds. The dog weighs 2 times as much as the cat.
telo118 [61]

Answer:

The dog weighs 16 pounds, while the cat weighs 8 pounds

Step-by-step explanation:

Let's call the weight of the dog d, and the weight of the cat c.

d+c=24

d=2c

Substitute the second equation into the first:

(2c)+c=24

3c=24

c=8

d=24-8=16

Hope this helps!

3 0
3 years ago
Find the length of CU, the triangles are similar.
Otrada [13]

Answer:

CU = 117

Step-by-step explanation:

Since the triangles are similar then the ratios of corresponding sides are equal, that is

\frac{WC}{WU} = \frac{CD}{UV}

substituting in values to the ratios

\frac{26}{36x-1} = \frac{24}{132} ( cross- multiply )

24(36x - 1) = 3432 ( divide both sides by 24 )

36x - 1 = 143 ( add 1 to both sides )

36x = 144 ( divide both sides by 36 )

x = 4

CU = 36x - 1 - 26 = (36 × 4) - 27 = 144 - 27 = 117


3 0
3 years ago
Convert this decimal into its fractional<br> form, simplified completely.<br> 0.650
podryga [215]

Answer:

13/20

Step-by-step explanation:

0.650 /1

0.650 × 100

1 × 100   =  

65 /100

65 ÷ 5

100 ÷ 5  =  

13 /20

4 0
3 years ago
How do you sketch the angle in standard position and 40 degrees
katen-ka-za [31]
A 40 degree angle: go from the right positive side of the x-axis and go left (left is positive degrees) forty degrees, which is a little less than halfway in quadrant 1.
8 0
3 years ago
HELP ASAP 2 MORE MINUTES ON TEST!!!!!!!!!!! PLEASE YALL HELP!
Damm [24]

Answer:

Length=60in

Width= 35 in

Step-by-step explanation:

Don’t forget the unit

6 0
2 years ago
Read 2 more answers
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