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3 years ago

Start solving #2 with the substitution method

Mathematics

1 answer:

Brums [2.3K]3 years ago

7 0

Answer:

A=3, B =3, C = 3

Step-by-step explanation:

9/3 (the letters) = 3 Each

3 - 24 - 3 = -27

2a = 6

6 - 3 + 3 = 6

A, b, c, all equal 3.

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Help me please<br>I want the step by step explanation!!

DiKsa [7]

Answer: AB=√17, AD=√98,6

Step-by-step explanation:

AB²=BC²+AC²-2*BC*AC*cosACB

AB²=5²+4²-2*5*4*0,6=25+16-24=17

AB=√17

AD²=AC²+CD²-2*AC*CD*cosACD

cosACD=cos(180°-ACB)=-cosACB

AD²=4²+7²-2*4*7*(-0,6)=16+49+33,6=98,6

AD=√98,6

4 0

2 years ago

Read 2 more answers

On a factory floor, 30 out of every 140 toy robots is defective. What percent is defective?

yaroslaw [1]

Answer:

$21.43\%$

Step-by-step explanation:

we know that

To find out the percent of robots which are defective, divided the number of defective robots by the total number of robots and multiply the result by 100

Let

x ----> the number of defective robots

y ----> the total number of robots

p ---> percentage of robots which are defective

$p=\frac{x}{y} (100)$

we have

$x=30\\y=140$

substitute

$p=\frac{30}{140}(100)$

$p=21.43\%$

5 0

3 years ago

Can you help me with this?

sineoko [7]

Answer:

See picture.

Sorry about the scrawly handwriting!

Step-by-step explanation:

You can split the figure into 2 trapezoids as shown.

5 0

3 years ago

Identify the amount, base, and percent in the problem: What is 60% of 485?

IrinaK [193]

Hey there! I'm happy to help!

The percent in the problem is 60% (as it has a percent time).

The base is the number we start with, so it is 485.

The amount is the percent of the base. As a decimal, 60% is 0.6. So, we just multiply this by 485.

0.6×485=291

Therefore, the amount is 291.

AMOUNT: 291

BASE: 485

PERCENT: 60%

Have a wonderful day! :D

3 0

3 years ago

What does 3,146 round to nearest thousand

Lisa [10]

3 is in the thousands
so the answer is 3000

4 0

3 years ago