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Dennis_Churaev [7]
4 years ago
8

3.) a + 40 = 0 What is the value of a? a =

Mathematics
2 answers:
Rus_ich [418]4 years ago
3 0

Answer:

a= -40

Step-by-step explanation:

Dmitry [639]4 years ago
3 0

Answer:

a = - 40

Step-by-step explanation:

a+40=0

First way:

Transpose 40 to the other side (to isolate a) - when transposing signs change ( from positive to negative)

Second way:

Subtract both side what 40 (to cancel 40 and isolate a)

* you have to always isolate variables

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Simplify the expression
GaryK [48]
<span>(3k^2+2)(k+5^2)
so first simplify the 5^2 = 25

so </span><span>(3k^2+2)(k+25)
now open the brackets : 
3k^3 + 75k^2 + 2k + 50

are you sure that the question has been copied exactly? as none of the options are correct in this case </span>
8 0
4 years ago
The ratio of boys to girls in a class is 3:4. There are 35 students in the class. How many students are boys?
marishachu [46]

Answer:

15:20

Step-by-step explanation:

3 + 4 = 7

35 / 7 = 5

5 x 3 = 15

5 x 4 = 20

Therefore the answer is 15:20

4 0
3 years ago
An investor invested a total of ​$3 comma 500 in two mutual funds. One fund earned a 4​% profit while the other earned a 2​% pro
lesya [120]

Answer:

$2000 invested in first fund

$1500 invested in second fund

Step-by-step explanation:

An investor invested a total of ​$3,500 in two mutual funds.

Let x be the amount invested in first fund

first fund earned a 4​% profit (4%= 0.04)

So interest is 0.04x for first fund

Let x be the amount invested in first fund

first fund earned a 4​% profit (4%= 0.04)

So interest is 0.04x for first fund

Let y be the amount invested in second fund

second fund earned a =2​% profit (2%= 0.02)

So interest is 0.02y for second fund

An investor invested a total of ​$3,500 in two mutual funds.

So x+y = 3500----> equation 1

y= 3500-x

the​ investor's total profit was ​$110

0.04x + 0.02y = 110----> equation 2

Plug in 3500 -x for y

0.04x + 0.02(3500-x) = 110

0.04x + 70 - 0.02x = 110

0.02x + 70 = 110

Subtract 70 onboth sides

0.02x = 40

Divide both sides by 0.02

x= 2000

y= 3500-x

so y= 3500 - 2000 = 1500

$2000 invested in first fund

$1500 invested in second fund



3 0
3 years ago
Two less than three times a number
Luba_88 [7]

Answer:

3x-2

Step-by-step explanation:

3 times a number is 3x, if we use x as the number

Two less than (3x) is 3x - 2

8 0
3 years ago
Points A , B , and C are collinear and AB : AC = 3 : 5. Point A is located at (2, 4), point B is located at ( x, 4), and point C
Mamont248 [21]

Answer:

x = 8

Step-by-step explanation:

xp = 2 +  \frac{3}{5} (12 - 2)

I did 12 -2 which equals 10

10 times 3/5 equals 6

6 plus 2 equals 8

6 0
3 years ago
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