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3 years ago

Jawad has seven rocks

Mathematics

2 answers:

Neporo4naja [7]3 years ago

8 0

Answer:

What’s the question?

Step-by-step explanation:

Alenkasestr [34]3 years ago

7 0

What’s the question?

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Solve the system of equations by substitution. 3/8 x + 1/3 y =17/24 and <br> x + 7y = 8

goblinko [34]

$\left \{ {{ \frac{3}{8}x+ \frac{1}{3}y = \frac{17}{14} } \atop {x+7y=8}} \right.$

To solve this system by substitution, first isolate x in the second equation.

$x+7y=8$
$x+7y-7y=8-7y$
$x=8-7y$

Now, plug this expression ( $8-7y$ ) for x in the top equation to solve for y.

$\frac{3}{8} (8-7y)+ \frac{1}{3} y= \frac{17}{14}$
$3- \frac{21}{8} y+ \frac{1}{3} y= \frac{17}{24}$
$72-63y+8y=17$
$72-55y=17$
$-55y=17-72$
$-55y=-55$
$y=1$

Now that you have y, plug it into the second equation and solve for x.

$x+7y=8$
$x+7(1)=8$
$x+7=8$
$x=1$

Last step is to plug your x- and y-values in to both equations to check your work.

$\frac{3}{8} (1)+ \frac{1}{3} y= \frac{17}{24}$

$\frac{3}{8} * \frac{3}{3} = \frac{9}{24} ; \frac{1}{3} * \frac{8}{8} = \frac{8}{24}$

$\frac{9}{24} + \frac{8}{24} = \frac{17}{24}$ <--True

$1+7(1)=8$
$1+7=8$ <--True

Answer:
$x=1 \\ y=1$

5 0

3 years ago

What is the following product? sqr root 10 x sqr root 10

DENIUS [597]

Answer:

Step-by-step explanation:

Note that $\sqrt{a}$ × $\sqrt{a}$ = a

Consider the following example

$\sqrt{100}$ × $\sqrt{100}$

= 10 × 10

= 100 ← the value inside the radical, thus

$\sqrt{10}$ × $\sqrt{10}$ = 10

6 0

3 years ago

On average, a person spends $240 every 3 months on their cellphone bill . What would the price for 1 month. How much would this

Elena L [17]

Answer:

$960

Step-by-step explanation:

price of one month = total expense/ number of month

= 240/3= $80

therefore persons annual expenses = 80*12= $960

3 0

3 years ago

Assessment timer and count Assessment items What are the square roots of 36/100 ? − 9/25 and 9/25, − 6/10 and 6/10, − 18/50 and

Tasya [4]

The answer is B. Take the square root of both the numerator and denominator of a fraction.

6 0

3 years ago

If f(x) = 1/2x – 10, then f^-1(x) =

r-ruslan [8.4K]

Answer:

f^-1 (x) = 2x+20

Step-by-step explanation:

f(x) = 1/2x – 10

To find the inverse, replace f(x) with y

y = 1/2 x -10

Exchange x and y

x = 1/2 y- 10

Solve for y

Add 10 to each side

x+10 = 1/2 y-10+10

x+10 = 1/2 y

Multiply by 2

2(x+10) = 1/2y *2

2x+20 = y

The inverse is

f^-1 (x) = 2x+20

7 0

3 years ago

Jawad has seven rocks ​

Jawad has seven rocks