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3 years ago

-2x + 5 = 10 Anyone know this? I need it quick

Mathematics

2 answers:

matrenka [14]3 years ago

6 0

Answer: x = -2.5

Step-by-step explanation:

Subtract 5 on each side to get -2x = 5

then divide both sides by -2 to get x = -2.5.

SVETLANKA909090 [29]3 years ago

5 0

Solve for x
-2x=10-5
Calculate
-2x=5
Divide
X=-(5/2)

Answer -(5/2) or -2 1/2 or -2.5

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One number exceeds another by 20 . The sum of the numbers is 78. What are the numbers

castortr0y [4]

Answer: 2 numbers are 19 and 39

Step-by-step explanation:

y = x + 20

Equation: x + y + 20 = 78

⇔ x + y = 78 - 20

⇔ x + y = 58

⇔ y = 58 - x

So, we have:

x + 20 = 58 - x ( = y)

⇔ x + x = 58 - 20

⇔ 2x = 38

⇔ x = 19

⇒ y = x + 20 = 19 + 20 = 39

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3 years ago

Zack has two savings accounts with the total of $9,000. He withdew 10 percent from one and 60 percent from the other to buy his

klio [65]

The remaining balances in the first and second account are $5805 and $1020 respectively.

Explanation

Suppose, the initial balance in the first account was $x$ dollar.

As the total amount in two accounts was $9000, so the initial balance in the second account was $(9000-x) dollar$

He withdrew 10% from the first and 60% from the second account to buy the ring which cost $2175. So, the equation will be......

$0.10x+0.60(9000-x)=2175\\ \\ 0.10x+5400-0.60x=2175\\ \\ -0.50x= 2175-5400= -3225\\ \\ x=\frac{-3225}{-0.50}= 6450$

So, the initial balance in the first account was $6450 and in the second account was ($9000 - $6450)= $2550

Thus, the remaining balance in the first account = 90% of $6450 = $(0.90*6450)= \$5805$

and the remaining balance in the second account = 40% of $2550 = $(0.40*2550)=\$1020$

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3 years ago

Simplify the expression using the distributive property. -15(v - 4)

Andreas93 [3]

Answer: -15v-60

Step-by-step explanation:

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Answer:

Step-by-step explanation:

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