All categories

3 years ago

20 POINTS!!! NEED ALL 4 ANSWERED!!!

Mathematics

1 answer:

TEA [102]3 years ago

3 0

Answer:

1. x = 10 2. x = 7 3. x = 1 4. x = 6

Explanation:

1. -2x + 81 = 61 (Subtract 81 from 61)

-2x = -20 (Divide)

x = 10

2. 9x - 58 = 5 (Add 58 to 5)

9x = 63 (Divide)

x = 7

3. 21 +10x = 3x + 28 (Rearrange expression)

21 - 28 = 3x - 10x (Combine like terms)

-7 = -7x (Divide)

x = 1

4. 9x - 42 = 2x (Rearrange)

9x - 2x = 42 (Combine like terms)

7x = 42 (Divide)

x = 6

You might be interested in

Jasper's lawn is 3/4 of an acre in size. The fertilizer bag states that 5 1/2 bags are required for 1 acre. How many bags does J

Nady [450]

Answer: $4\dfrac{1}{8}\ \text{bags}$

Step-by-step explanation:

Given

Jasper lawn is three-fourth of an acre

1 acre of land requires $5\frac{1}{2}$ bags

convert mixed numeral to fraction

$\Rightarrow 5\dfrac{1}{2}=\dfrac{11}{2}$

$\therefore 1\ \text{acre}\equiv\dfrac{11}{2}\ \text{bags}\\\\\Rightarrow \dfrac{3}{4}\ \text{acre}\equiv \dfrac{11}{2}\times \dfrac{3}{4}=\dfrac{33}{8}\ \text{bags}$

$\Rightarrow \dfrac{33}{8}\ \text{bags}=4\dfrac{1}{8}\ \text{bags}$

8 0

2 years ago

What is true about the graphs of y = x^2 – 2 and y = x^2 + 2?

ASHA 777 [7]

Answer:

Graphs behave differently at various x-inter cepts. Sometimes the graph will cross over the x-axis at an intercept. Other times the graph will touch the x-axis and bounce off.

Suppose, for example, we graph the function. f(x) = (x+3)(x - 2)²(x+1)³.

Notice in the figure below that the behavior of the function at each of the x-intercepts is different.

6 0

3 years ago

Problem ID: PRABJVTY

aksik [14]

Answer:

I'm confused too I'm sorry

3 0

3 years ago

Find the future value of an annuity due of $7,000 paid at the beginning of each 6-month period for 8 years if the interest rate

Oliga [24]

Answer: Im not sure but i think its 120,960

Step-by-step explanation: i know that there is 2 of the 6-month periods in a year and multiplied that by 8 and got 16. Then i did 7000x.08=560 and then i added that to 7000 and got 7560. FInally i multiplied that by 16 and got 120,960.

4 0

2 years ago

Write a division problem with as the dividend and 3 as the divisor. Then, find the quotient.

Mekhanik [1.2K]

Step-by-step explanation:

The dividend is the number which is being divided and the divisor is what you divided by. An example is:

12 ÷ 3. The quotient is 4.

4 0

3 years ago

Read 2 more answers