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bekas [8.4K]
3 years ago
8

1. Evaluate 3y - 4 for y =5

Mathematics
1 answer:
irina1246 [14]3 years ago
3 0

Answer:

1. Evaluate 3y - 4 for y =5

3*(5)-4=15-4=11

2. 65 + x = 99 x = ?

65+x=99

x=99-65

x=34

3. Find the product. 38.7 *21

38.7*21=812.7

4. Which value satisfies the equation? 9x + 3 = 30

The right value for x would be:

9x+3=30

9x=30-3

9x=27

x=27/9=3

Step-by-step explanation:

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Which table represents a linear function?
Gekata [30.6K]

Answer:

C.

Step-by-step explanation:

please mark brainlist

3 0
2 years ago
What is 18% of 50?<br> _90<br> _50<br> _36<br> _9<br> _18
FrozenT [24]

Answer:

9

Step-by-step explanation:

percentages are reversable. like instead of 18% of 50 you could reverse it and say what is 50% of 18. which is 9.

5 0
3 years ago
Read 2 more answers
Would be wonderful if you help me out! heres a lolipop xD
ser-zykov [4K]
300ft cause A=lw and it said its a square so all sides are the sam
so
300 times 300 = 900
5 0
3 years ago
A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution. How many of each should be used ?
schepotkina [342]

Answer:

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

Step-by-step explanation:

Let us represent:

The number of liters of 25% acid solution = x

The number of liters of 40% acid solution = y

Our system of Equations =

x + y = 240 liters....... Equation 1

x = 240 - y

A 25% acid solution must be added to a 40% solution to get 240 liters of 30% acid solution.

25% × x + 40% × y = 240 liters × 30%

0.25x+ 0.4y = 72...... Equation 2

We substitute 240 - y for x in Equation 2

0.25(240 - y)+ 0.4y = 72

60 - 0.25y + 0.4y = 72

Collect like terms

- 0.25y + 0.4y = 72 - 60

0.15y = 12

y = 12/0.15

y = 80 Liters

Solving for x

x = 240 - y

x = 240 liters - 80 Liters

x = 160 liters

Therefore,

The number of liters of 25% acid solution = x = 160 liters

The number of liters of 40% acid solution = y = 80 liters

5 0
2 years ago
3.<br><br> What is the value of a + bc when a = 7, b = 4, and c = 1/2
Brums [2.3K]

Answer:

9

Step-by-step explanation:

Replace a by 7

and

b by 4

and

c by 1/2

7+4(1/2)

7+2=9

3 0
2 years ago
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