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3 years ago

Please please help me with this!!

Mathematics

1 answer:

DIA [1.3K]3 years ago

5 0

5-2x. That’s the answer

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use the elimination method to solve the system of equations choose the correct ordered pair 7x+4y=39 2y+4y=14

Anvisha [2.4K]

$x = 5 \: and \: y = 1.$

Step-by-step explanation:

$7x + 4y = 39 \: - {eq}^{n} (1)$

$2x + 4y = 14 \: \: - {eq}^{n} (2)$

Multiply Equation no (1) with 2 and Equation no (2) with 7.

$14 x + 8y = 78.$

$14x + 28y = 98.$

$( - ) \: \: \: ( - ) \: \: \: ( - )$

$0x + -20y = - 20$

$- 20y = - 20$

$y = \frac{ - 20}{ - 20}$

$y = 1$

Substitute the value of "y" in Equation no (1)

$7x + 4y = 39.$

$7x + 4(1) = 39.$

$7x + 4 = 39.$

$7x = 39 - 4$

$7x = 35.$

$x = \frac{35}{7}$

$x = 5.$

6 0

2 years ago

Read 2 more answers

PLEASEEEEEEEEEEEEEEEE HELPPPPPPPPPPPPPPPPPPPPPPP

ch4aika [34]

Answer:

$-\dfrac{3}{5}$

Step-by-step explanation:

1. Find the numerator:

$\dfrac{1}{3}-\dfrac{5}{6}=\dfrac{1\cdot 2}{3\cdot 2}-\dfrac{5}{6}=\dfrac{2}{6}-\dfrac{5}{6}=\dfrac{2-5}{6}=-\dfrac{3}{6}=-\dfrac{1}{2}.$

2. Simplify the fraction:

$\dfrac{-\frac{1}{2}}{\frac{5}{6}}=-\dfrac{1}{2}\cdot \dfrac{6}{5}=-\dfrac{3}{5}.$

7 0

3 years ago

The graph of y = f(x − 3) is a _____ of the graph of y = f(x).

Phoenix [80]

<h2>Answer:</h2>

shift

<h2>Step-by-step explanation:</h2>

These are common types of transformations of functions. Many functions have graphs that are simple transformations of the parent graphs, that are the most basic functions. In this way, we can use vertical and horizontal shifts to sketch graphs of functions. These are rigid transformations because the basic shape of the graph is unchanged. Therefore $y=f(x-3)$ is a Horizontal Shift, so the graph of the function $y=f(x)$ has been shifted 3 units to the right.

5 0

3 years ago

Read 2 more answers

CAN SOMEONE PLZZ ANSWER!!

iragen [17]

Answer:

the people that are older can name a greater amount of states than the younger ones

Step-by-step explanation:

8 0

3 years ago

The ratio of boys to girls in a group is 7:1. If there are 66 more boys than girls, work out how many girls there are

IRISSAK [1]

Answer:11

Step-by-step explanation:

Boys : girls=7:1

Sum of ratio=7+1=8

Let number of girls be y

Then number of boys=y+66

Total number of pupils=y+y+66

Total number of pupils=2y+66

girls only=(girl ratio)/(sum of ratio) x (total number of pupils)

y=1/8 x (2y+66)

Cross multiply

y x 8=2y + 66

8y=2y + 66

Collect like terms

8y-2y=66

6y=66

Divide both sides by 6

6y/6=66/6

y=11

There are 11 girls

3 0

3 years ago