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3 years ago

What is? y=x+5 2y-x=13

Mathematics

2 answers:

Oduvanchick [21]3 years ago

8 0

Answer:

Step-by-step explanation:

y-x=5 2y-x=13 subtract -y=-8 y=8 8*5 y=8-5=3

mixer [17]3 years ago

5 0

Answer:

x=3

y=8

Step-by-step explanation:

y-x=5

2y-x=13

subtract

-y=-8

y=8

8-x=5

x=8-5=3

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Chord JK intersects chord ST at point L. Find the length of St. If necessary, round to the tenths place.

raketka [301]

Answer:

Step-by-step explanation:

The diagram is drawn and attached.

Using the intersecting chord theorem

SL X LT = JL X LK

x X 12 = 14(x-1)

12x=14x-14

12x-14x=-14

-2x=-14

x=7

Therefore:

ST= SL + LT

=x+12

=7+12

ST=19

The correct option is C

5 0

3 years ago

Which equation has the same soultions as x^2+6×-7=0

blagie [28]

$x^2+6x-7=0 \\ a=1 \\ b= 6 \\ c=-7 \\ \\ \boxed{\boxed{\Delta=b^2-4ac}} \\ \\ \Delta=6^2-4*1*(-7) \\ \Delta=36-(-28) \\ \Delta=64 \\ \Delta\ \textgreater \ 0 \Rightarrow \text{we have 2 solutions :} X_1 \ and X_2 \\ \\ \boxed{X_1= \frac{-b- \sqrt{\Delta} }{2a} } \Rightarrow X_1= \frac{-6-8}{2}=-7 \\ \\ \boxed{X_2= \frac{-b+ \sqrt{\Delta} }{2a} } \Rightarrow X_2= \frac{-6+8}{2} =1$

4 0

3 years ago

Mary is five times older than Julian. If the<br> sum of their ages is 42, how old is Mary?

Tanya [424]

Answer:

Step-by-step explanation:

M=5J

J=M/5

42=6J

42/6=7

Jullian is 7

7x5=35

Mary is 35

35+7=42

4 0

3 years ago

Read 2 more answers

33/15 as a mixed number or whole number please hurry!

balu736 [363]

Answer:

2½

Step-by-step explanation:

33÷15 you got this don't give up

4 0

2 years ago

In △ABC, D is a point on side AC¯¯¯¯¯¯¯¯ such that BD=DC and ∠BCD measures 70∘. What is the degree measure of ∠ADB?

777dan777 [17]

If angle BCD measures 70° then so does angle DBC (because you have formed an isoceles triangle inside the larger ΔABC and the two legs are equal so the two angles have to be equal. So we have a two 70° angles which leaves 40° for the 3rd angle, which is ∠BDC.

Since ∠BDC and ∠ADB are supplementary (180°) - that leaves 140° for ∠ADB and is our answer

5 0

3 years ago