All categories

3 years ago

-5x +13y =-7 5x +4y=24 x= y=

1 answer:

3 0

X=4
Y=1
You already have the equation done from that equation you cross out the -5x and 5x then add 13+4 it gives you 17 the add -7+34 it gives you 17 that’s when you get x. Now ones you have x plug in the 1 into any equation I prefer the ones that don’t have negative numbers, ok so the plug in 1 into the Y and then it would be 5x+4(1)=24, so you know 4(1) is 4 so then subtract 24-4 which gives you 20 and then bring down 5x and then divide 24/5 and then you get what X is and it is 5.

You might be interested in

When they say solve the product in the lowest terms what do they mean?

m_a_m_a [10]

when people say " in lowest terms" they usually mean like the simplified version of an answer

an example of this would be like

make $\frac{2}{4}$ into lowest terms

the answer would be $\frac{1}{2}$

if you dont understand comment on this and ill try to break it down more

8 0

3 years ago

Please help I will give brainliest.

aleksley [76]

A polygon that has both reflectional and rotational symmetry includes:

B. Square
C. Triangle
E. Equilateral Triangle.

<h3>What is a polygon?</h3>

A polygon is a closed curve made up of a set of line segments (sides) connected in such a way that no two segments cross.

Examples of polygons are triangles (three sides), quadrilaterals (four sides), and pentagons (five sides).

Triangle, square, and other quadrilaterals have both line symmetry and rotational symmetry.

Thus, a polygon that has both reflectional and rotational symmetry includes Options B, C, and E.

Learn more about polygons and reflectional and rotational symmetry at brainly.com/question/1592456 and brainly.com/question/18633533

#SPJ1

4 0

2 years ago

The diagram below is a scale drawing of a former's vegetable garden, where the length is 12 inches and the width is inches. The

padilas [110]

Shouldn’t there show the diagram - unless i have to draw one , unless there’s 1 side with the length of 12

6 0

3 years ago

Q20-23 with steps pls

just olya [345]

20: Let $x$ be the amount of money. If this amount is shared between 8 people, each person will get x/8 dollars. But there actually are 6 people, so everyone is getting x/6 dollars. We know that this difference results in 30 dollars more, so we have

$\dfrac{x}{6}=\dfrac{x}{8}+30 \iff \dfrac{x}{6}-\dfrac{x}{8}=30$

Rearrange the left hand side as

$\dfrac{4x-3x}{24}=30$

And multiply both sides by 24 to get

$x=720$

21: Let $M$ and $J$ be the number of marbles owned by Mike and Judy, respectively. At the beginning, we have

$M=3J+11$

If they both get 9 more marbles, Mike will have $M+9$ marbles, and Judy will have $J+9$ marbles. So, we have

$M+J+18=93 \iff M+J=75 \iff M=75-J$

Plug this value in the first equation and we have

$75-J=3J+11 \iff 4J=64 \iff J=16$

And we deduce

$M=16\cdot 3 + 11=59$

So, the difference is

$M-J=59-16=43$

22: Let $x,y,z$ be the number of $10, $20 and $50 coupon, respectively. We're given:

$\begin{cases}x=2y+3\\z=\frac{1}{2}y\\x+y+z=38\end{cases}
We can write the third equation by substituting the expressions for x and z:
[tex]x+y+z=(2y+3)+y+\left(\dfrac{1}{2}y\right)=38$